National Service Change Notices and Public Statements

When NWS proposes or finalizes changes to products or services, this page is updated and official notices are sent out on the NOAA Weather Wire Service (NWWS), the Emergency Managers Weather Information Network (EMWIN) and NOAAPort.

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• Service Change Notices
• Archived: Technical Implementation Notices
• Data Management Messages

Public Information Statements: 2018

• Nov 30: PNS18-33: Soliciting public comment through December 31, 2018, on proposed 360 character NWS messages for select weather warnings carried by WEA
• Nov 15: PNS18-32: Soliciting comments on experimental Graphical Forecasts for Aviation for the Gulf of Mexico, Caribbean Sea and western North Atlantic Ocean through December 31, 2018
• Nov 6: PNS18-31: Soliciting comments on the termination of the GEFS MOS product (MEN) and GMOS/MOSGuide through December 31, 2018
• Oct 19: PNS18-30: Comments Solicited on addition of snow level grids for select CONUS WFOs as an experimental element in the NDFD through April 30, 2019
• Oct 16: PNS18-29: NWS Hazard Simplification (Haz Simp) Project: Soliciting Public Comments through November 10, 2018, on Proposed Consolidation of NWS Winter Precipitation Warning Products
• Sep 15: PNS18-28: Soliciting comments on NWS provision of avalanche information through October 31 2018
• Sep 17: PNS18-26 Updated: Nationwide Wireless Emergency Alert and Emergency Alert Systems Tests Scheduled for October 3, 2018
• Sep 13: PNS18-27: Alerting partners to the potential for non-sequential Tropical Cyclone (TC) storm numbering in the Atlantic Basin effective immediately
• Aug 31: PNS18-25: Soliciting comments on the experimental Lake Erie  Harmful Algal Bloom webpage hosted by WFO Cleveland through October 31, 2018
• Aug 28: PNS18-24: Soliciting comments on experimental graphics provided by the CPHC for tropical cyclones in the South Pacific basin based on forecasts issued by the JTWC through December 31, 2018
• Aug 23: PNS18-23: Soliciting Comments through September 26,2018, on Changes to VTEC and Event Tracking Numbers (ETN) for domestic Tsunami Test Products
• Aug 21: PNS15 Updated: Continuing experimental status in offshore and high seas gridded forecasts from NHC TAFB and offshore gridded forecasts from OPC in the Pacific Basin through December 31, 2018
• Aug 8:  PNS18-22: NWS Hazard Simplification Project: Collecting Public Comment on the Proposed Consolidation and Reformatting of NWS Flood Hazard Messaging Products through September 7, 2018
• Aug 6: PNS18-21:  National Tropical Cyclone Watch Warning Product (TCV) Product Collaboration Tests August 6-10, 2018
• Jul 31: PNS18-20: Soliciting Comments on Proposed Format Change to the Surf Zone Forecast through August 31, 2018
• Jul 16: PNS18-19: Soliciting comments on the annotated outline of NOAA's Subseasonal and Seasonal Forecasting Innovation: Plans for the 21st Century, a report to Congress though August 10, 2018
• Jul 2: PNS18-18: Soliciting comments on an experimental Arrival of  Tropical-Storm-Force Winds Base Data through November 30, 2018
• Jun 15: PNS18-17: NWS Test of Fixed Grid Mapped Geostationary Operational Environmental Satellite-16 (GOES-16) Imagery, June 14-15, 2018
• Jun 8: PNS18-16: NOAAPort/SBN Earth Station – Registration of Earth Station Receive Antenna(s)
• May 21: PNS18-14: Soliciting Comments on the Proposed Upgrade of the RTMA/URMA/RTMA-RU through June 18, 2018
• May 17: PNS18-13: Soliciting comments on proposed termination of County-based Flash Flood Guidance (FFG) at all locations through June 30, 2018
• May 17: PNS18-12: National Tropical Cyclone Watch Warning Product (TCV) Product Collaboration tests May 21-24, 2018
• May 15: PNS18-11: NWS Hazard Simplification (Haz Simp) Project: Soliciting Public Comments through June 15, 2018, on Proposed Consolidation and Reformatting of NWS Non-Precipitation Weather Hazard Products
• May 14: PNS18-10: National Safe Boating Week: May 19-25, 2018
• May 11: PNS18-08 Updated: Comment period extended through June 30, 2018, on the proposed termination of the NWS Hydrologic Information Center (HIC) website
• May 8: PNS18-09: Science improvements to the Suomi National Polar-orbiting Partnership (S-NPP) Satellite's NUCAPS Atmospheric Soundings products effective May 3, 2018
• Apr 27: PNS18-07: Changes to Section E of the Post Tropical Cyclone Report (PSH) Noted in the 2018 Version of NWSI 10-601 Will Be Delayed Until Further Notice
• Apr 26: PNS18-06: Soliciting comments on PQPF graphics from May 1, 2018, through March 1, 2019
• Apr 2: PNS18-05: Soliciting Public Comments on the Proposed Upgrade of the CMAQ through Apr 13, 2018
• Mar 27: PNS18-04 Updated: Soliciting comments through June 30, 2018, on proposed enhancements to the Alaska River Ice Breakup Map
• Mar 21: PNS18-03: Soliciting Public Comments on the Proposed Upgrade of HWRF and HMON operational models through April 12, 2018
• Mar 15: PNS18-02: Soliciting Comments on the Upgrade of Experimental National Blend of Models Guidance through June 27, 2018
• Mar 13: PNS18-01: Updated: Soliciting Public Comments on the Proposed Upgrade of the NLDAS Operational System through April 09, 2018
• Mar 13: PNS18-01: Soliciting Public Comments on the Proposed Upgrade of the NLDAS Operational System through April 09, 2018
• Feb 22: PNS15: Updated: Continuing experimental status in offshore and high seas gridded forecasts from NHC TAFB and offshore gridded forecasts from OPC in the Pacific Basin through December 31, 2018
• Jan 30: PNS15 Updated: Soliciting Comments until April 30, 2018, on the Days 3-7 Winter Storm Threat Index from NWS WFO Baltimore/Washington, DC

Public Information Statements: 2017

• Dec 20: PNS17-40: Soliciting Comments on the Proposed Upgrade of the RAP and HRRR operational models through January 20, 2018
• Dec 19: PNS17-39: Soliciting Comments on Proposed Discontinuation of High Seas and Storm Warning over NIST Time Frequency Broadcasts through January 20, 2018
• Dec 14: PNS17-38: Soliciting comments on proposed termination of TAFs at the following locations, Gage, OK (KGAG) and Hobart, OK (KHBR) through January 15, 2018
• Dec 12: PNS17-37: NWS Hazard Simplification (Haz Simp) Project: Soliciting Public Comments through January 11, 2018, on Proposed Consolidation and Reformatting of NWS Marine Hazard Messaging Products
• Nov 7: PNS17-36: Soliciting comments on the Experimental Extreme Precipitation Monitor starting November 8, 2017 through April 30, 2018
• Nov 6: PNS17-35: Soliciting comments on the Experimental National Forecast Chart starting November 7, 2017 through December 1, 2018
• Oct 26: PNS17-34: Soliciting comments on Experimental NOAA NWS Runoff Risk Analysis Data (Version 2) for the Great Lakes states through November 30, 2018
• Oct 24: PNS17-33 Updated: Soliciting public comments on the Extended Traffic Flow Management (TFM) Convective Forecast (TCF) experimental product through May 15, 2018
• Sep 20: PNS17-32: Soliciting comments until October 24, 2017, on the proposed termination of the EMWIN ByteBlaster and HostMaster services
• Oct 6: PNS17-31 Updated: NWS Hazard Simplification (Haz Simp) Project: Soliciting Public Comments through October 12, 2017, on Proposed Consolidation and Reformatting of NWS Marine Hazard Messaging Products
• Aug 22: PNS17-30 Updated: Soliciting comments through September 15, 2017, on the Proposed Operations Implementation of Polygon-based Snow Squall Warnings, and Dust Storm Warnings and Advisory Products
• Aug 9: PNS17-29: Soliciting Comments on Proposed Termination of Earthquake Report Messages through September 15, 2017
• Aug 1: PNS17-28: Soliciting comments on the proposed transition of the NWS EMWIN FTP service through September 15, 2017
• Jul 10: PNS17-27: Soliciting Comments on Termination of the National Convective Weather Diagnostic and Forecast Product (NCWD/NCWF) until September 30, 2017
• Jun 26: PNS17-26: Soliciting comments on proposed changes to 500mb forecasts and terminating production of a small suite of products through July 31, 2017
• Jul 25: PNS17-25 Updated: National Tropical Cyclone Watch Warning Product (TCV) Product Collaboration Tests Starting July 26, 2017
• May 19: PNS17-24: National Safe Boating Week, May 20-26, 2017
• May 11: PNS17-23: Climate Prediction Center is soliciting comments through September 1, 2017, on a proposal to discontinue theHTML format of the ENSO Diagnostic Discussion
• May 5: PNS17-22: Soliciting comments on an experimental Arrival of Tropical-Storm-Force Winds Graphic through November 30, 2017
• May 5: PNS17-21: National Tropical Cyclone Watch Warning Product (TCV) Product Collaboration Tests starting May 8, 2017
• May 1: PNS17-20: Soliciting comments on MDL Model Output Statistics (MOS) product suite through June 30, 2017
• Apr 27: PNS17-19: Soliciting Public Comments on the Proposed Upgrade of 2.5 km Gridded Model Output Statistics Guidance over the CONUS to operational status through May 31, 2017
• Apr 27: PNS17-18: Change of Heat Advisory thresholds for New England Effective immediately
• Apr 24: PNS17-17: Soliciting comments on the proposed changes to the surface analyses and surface forecast charts through until May 24, 2017
• Apr 21: PNS17-16: Soliciting Comments on Proposed Termination of the State Forecast Product until June 21, 2017
• Apr 17: PNS17-15: New Geographic Information Service (GIS) Service: radar_base_reflectivity_time effective May 15, 2017
• Apr 14: PNS15 Updated: Soliciting comments on Experimental Weeks 3-4 Precipitation Outlooks through April 15, 2018
• Apr 14: PNS17-14 Updated: Exploring use of Facebook Live and Periscope Social Media Application through approximately August 31, 2017
• Apr 11: PNS17-13: NWS Hazard Simplification Project: Collecting Public Comment on a Proposed Operational Demonstration to Consolidate and Reformat NWS Winter and Flood Hazard Messaging Products through May 31, 2017
• Apr 7: PNS17-12: Seeking Public Comment and Review on a prototype Regional Rainfall web page from NWS Corpus Christi through through October 4, 2017
• Apr 3: PNS17-11 Updated: Soliciting Comments on the Experimental Aviation Surface Forecast and Aviation Cloud Forecast Graphics through April 30, 2017
• Mar 8: PNS17-10: Soliciting comments through April 9, 2017, on proposed changes to the suite of graphics and GIS files accompanying Tropical Cyclone Advisory packages
• Feb 21: PNS17-09: Soliciting Comments on Proposed Termination of Three National Hurricane Center Guidance Messages Through March 23, 2017
• Feb 15: PNS17-08 Updated: Soliciting public comments through October 31, 2017, on changes to the legacy Collaborative Convective Forecast Product (CCFP)
• Feb 13: PNS17-07: Soliciting Public Comments on the Removal of GFDL Hurricane Model Products and Addition of New HMON Hurricane Model Products through March 17, 2017
• Feb 13: PNS17-06: Soliciting Comments on the Removal of NCEP's hurricane wave (Multi_2) modeling system through March 17, 2017
• Feb 2: PNS17-05 Updated: Climate Prediction Center changing to grid-based historical data for production of the Degree Day Outlook Product beginning March 16, 2017
• Feb 2: PNS17-04: Soliciting comments through March 4, 2017, on changing criteria for issuing tropical cyclone watches and warnings to include certain land-threatening disturbances that are not yet tropical cyclones
• Dec 19, 2017: PNS17-03 Updated: Soliciting Comments until April 30, 2018, on the Prototype Winter Storm Severity Index (WSSI)
  Feb 2: PNS17-02: Soliciting Comments on Proposed Changes to the Automated Surface Observing Systems (ASOS) Augmentation and Backup Responsibilities in Alaska and Pacific Regions through February 20, 2017n and Backup Responsibilities in Alaska and Pacific Regions through February 20, 2017
• Jan 23: PNS17-01: NWS Hazard Simplification Project Activity #3: Collecting Public Comments on a Winter Weather Hazard Messaging "Episode" through February 19, 2017

PNS: 2016

• Dec 14: PNS16-43: Soliciting Public Comments on the Removal of NCEP's Great Lakes Wave (GLW) Forecast System NAM-driven cycles through January 6, 2017
• Dec 7: PNS16-42 Corrected: Soliciting comments on the operational implementation of the Hurricane Local Watch/Warning Product (TCV) at WFO Honolulu (HFO) Through January 6, 2017
• Dec 7: PNS16-41 Corrected: Soliciting Comments on Proposed Changes to the Hurricane Local Statement (HLS) from WFO Honolulu (HFO) Through January 6, 2017
• Nov 29: PNS16-40: NWS Hazard Simplification Project Activity #2: Collecting Public Comment on a Proposed Consolidation and Reformatting of Winter Advisory, and Flooding Watch and Advisory Products through December 31, 2016
• Nov 23: PNS16-39: Soliciting Comments until January 31, 2017, on the Removal of NBM Apparent Temperature and Relative Humidity grids from NOAAPORT
• Nov 21: PNS16-38: Soliciting Comments until December 21, 2016, on an NWS Proposal to Move to Common Alerting Protocol Version 1.2 Messages on February 1, 2017
• Nov 16: PNS16-37: Soliciting Comments until January 19, 2017, on the Proposed Termination of the Weather Activity Planner
• Nov 14: PNS16-36: Soliciting Public Comments on the Removal of NCEP RTOFS Atlantic Forecasting System through December 15, 2016
• Oct 17: PNS16-35: Soliciting Comments on Changes to the NWS Forecast website at forecast.weather.gov through November 15, 2016
• Oct 19: PNS16-34 Amended: Soliciting public comments on the removal of North American Model (NAM) and Downscaled GFS by NAM Extension (DGEX) products through November 11, 2016
• Nov 28, 2017: PNS16-33 Updated: Soliciting comments on the Experimental Modernized Open Lakes Forecast for the Great Lakes through March 31, 2018
• Sep 15: PNS16-32: Soliciting Comments until September 15, 2017, on the Experimental Post Wildfire Debris Flow and Flash Flood Webpage
• Sep 8: PNS16-31: Soliciting Comments until September 30, 2016, on Discontinuing the Texas River and Recreation Advisory (RVSFWR)
• Sep 7: PNS16-30: Effective September 7, 2016, NWS is launching a new website for the NWS Hazard Simplification Project and soliciting feedback on two optional hazard maps for the weather.gov home page
• Aug 26: PNS16-29: Soliciting Comments on the Experimental Water Information Interface Webpage until February 21, 2017
• Jul 29: PNS16-28: Exploring use of Instagram Social Media Service from August 1, 2016 through approximately November 2, 2016
• Jul 26: PNS16-27: Solicitation of comments on experimental National Digital Forecast database (NDFD) 3km Alaska Region (AR) Forecast Grids effective August 24, 2016
• Jul 21: PNS16-26: Experimental Offshore Waters Forecasts for the Northeast Pacific Ocean within 250 NM of Mexico, Central America, Colombia, and Ecuador Effective
  July 20, 2016
• Jul 14: PNS16-25: National Tropical Cyclone Watch Warning Product (TCV) Product Collaboration Tests, July 18-21, 2016
• Jul 11: PNS16-24: Seeking Public Comment and Review on Experimental Severe Weather Impact Graphics through December 31, 2016 (Continental U.S. only)
• Jul 11: PNS16-23: Soliciting Public Comments Through August 11, 2016, on Updated Description of NWS Use of Twitter
• Aug 1:  PNS16-22 Corrected: Soliciting Comments until July 30, 2016, on Security Updates for the NWS Email Data Input System (EDIS)
• Jul 28: PNS16-21 Amended: Soliciting comments through November 30, 2016, on proposed changes to Tropical Cyclone Watch/Warning (TCV) and Hurricane Local Statement (HLS) products for Atlantic tropical cyclones affecting the continental US
• Jun 27: PNS16-20: Soliciting Comments through July 27, 2016, on the Aviation Weather Center (AWC) Experimental Impacts Terminal Aerodrome Forecast (TAF) Board
• Jun 7: PNS16-19: Change to the contact information of Pressure Standards Laboratory Effective June 16, 2016
• Jun 3: PNS16-18 Corrected: National TCV Product Collaboration Tests, June 6-9, 2016
• May 27: PNS16-17: Soliciting Comments until June 30, 2016, on the Proposed Termination of the Production of Legacy Redbook Graphics
• May 25: PNS16-16: "Don't Fry Day" Friday, May 27, 2016: Excessive Heat and Sun Safety Guidance for 2016 Season
• May 20: PNS16-15: National Safe Boating Week, May 21-27, 2016
• May 19: PNS16-14: Child Vehicular Heatstroke Awareness and Prevention Safety Guidance for 2016
• May 18: PNS16-13: Soliciting Comments until June 17, 2016 on Proposed Changes to the Excessive Rainfall Outlook
• May 16: PNS16-12: Comments Sought by July 15, 2016, on National Weather Service Philosophy for Impact-Based Decision Support Services
• May 10: PNS16-11: Soliciting Comments until June 15, 2016, on Proposed Changes to the Distribution Times of the Northern Hemispheric Chart and Day 4-5 and Day 6-7 Quantitative Precipitation Forecasts
• May 10: PNS 16-10: Mixed-Case Text/95 ASCII Character Set Short Duration Watch, Warning and Advisory Product Examples, Tentatively Scheduled July–August 2016
• Apr 4: PNS16-09: Soliciting comments through June 6, 2016 on the Experimental AWC PIREP Online Submission Form
• Apr 4: PNS16-08: Soliciting comments on new Weather Prediction Center homepage from April 5 until July 1, 2016
• Apr 4: PNS16-07: Exploring use of Periscope Social Media Application through approximately July 31, 2016
• Feb 29: PNS16-06: Soliciting Comments by October 28, 2016, on the Experimental Collaborative Aviation Weather Statement (CAWS)
• Feb 22: PNS16-05: Soliciting Comments until March 31, 2016, on the Proposed Termination of the NWS Weather.Noaa.Gov (WNG) Website
• Feb 17: PNS16-04: Soliciting public comments on the removal of legacy Global Forecast System (GFS) gridded output through March 25, 2016
• Feb 5: PNS16-03: Change to the Name of the Recreational Report (RECAFG) from Mount McKinley Recreational Forecast to Denali Recreational Forecast Effective on or about April 20, 2016
• Feb 5: PNS16-02: Soliciting Comments until March 15, 2016, on the expansion of the Operational Marine Forecast Matrix produced by WFO Honolulu to National Scope
• Apr 8: PNS16-01 Amended: Comment period extended for Experimental Graphical Forecasts for Aviation through June 11, 2016

PNS Issued in 2015 or earlier Updating Earlier Notices

• Aug 21, 2018: PNS15 Updated: Continuing experimental status in offshore and high seas gridded forecasts from NHC TAFB and offshore gridded forecasts from OPC in the Pacific Basin through December 31, 2018
• Jan 30, 2018: PNS15 Updated: Soliciting Comments until April 30, 2018, on the Days 3-7 Winter Storm Threat Index from NWS WFO Baltimore/Washington, DC
• Oct 26, 2017: PNS15 Updated: Comment Period extended through April 30, 2018, on the Experimental Lake Effect Snow (LES) Warning Polygons from WFO Buffalo, NY
• Mar 9, 2017: PNS13 Updated: Soliciting Comments on the Experimental Maximum Wave Height in GLF and NSH through December 31, 2017
• Dec 15, 2017: PNS14 Updated: Soliciting Comments until April 30, 2018, on the Expansion of the Winter Weather Probabilistic Experiment beginning December 15, 2017
• Dec 12, 2016: PNS14 Amended: To Extend the comment period for the Experimental Wind Compression Decision Support Graphic at the Fort Worth, TX, CWSU (ZFW) and to begin accepting comments at the New York, NY CWSU (ZNY) through May 2017
• Sep 27. 2016: PNS14: Amended: Soliciting comments on the Experimental Enhanced Coastal Waters Forecast Using Rayleigh Distribution for Wave Heights through Jan 11, 2018
• Dec 16, 2016: Soliciting comments on the Experimental Days 4-7 Winter Storm Threat Index at Weather Forecast Office (WFO) Baltimore/Washington through April 15, 2016

For older PNS, SCNs and TINs go to https://www.weather.gov/notification/archive

Service Change Notices (SCN) Issued in 2018

• Nov 28: SCN18-78: Update: Correction of the GRIB2 encoding of the Probability of Thunder in the experimental National Blend of Models guidance (NBM) effective December 05, 2018, and the request for comments
• Nov 28: SCN18-109:  Implementation of TAF Service for Phoenix Deer Valley Airport (KDVT) in Arizona effective March 6, 2019
• Nov 28: SCN18-108 Updated: Implementation of TAF Service for KMVN, Mount Vernon, IL, Effective February 13, 2019
• Nov 21: SCN18-107: Modification of the WMO header for Alaska Region TAF products effective February 4, 2019
• Nov 20: SCN18-100 Updated: URLs for the NOAA NCEP websites will be redirected to HTTPS effective immediately through December 31, 2018
• Nov 20: SCN18-96 Updated: RTMA/URMA/RTMA-RU upgrade implementation start time changed to the 1200z cycle on December 4, 2018
• Nov 19:  SCN18-106: Changes to GOES-17 Imagery on the Satellite Broadcast Network (SBN or NOAAPORT) Leading to the GOES West Transition effective November 15, 2018
• Nov 16: SCN18-105: Discontinuation of Great Lakes Online (GLOL) Great Lake Observation Product at NOS/CO-OPS, effective December 4, 2018
• Nov 16: SCN18-104: Air Quality Prediction Update: Effective December 18, 2018
• Nov 15: SCN18-103:  Upgrade of NOAA nowCOAST GIS Web Mapping Portal Effective on or about November 19, 2018
• Nov 15: SCN18-102 Updated: Discontinuation of NWS High Seas and Storm Warnings over NIST Time Frequency Broadcasts Effective January 31, 2019
• Nov 15: SCN18-101: NDBC Removing files from TGFTP service Effective November 20, 2018
• Nov 15: SCN18-100: URLs for the NOAA NCEP websites will be redirected to HTTPS  Effective immediately through December 31, 2018
• Nov 9: SCN18-99: Transition Long Range River Flood Risk Outlook (LRO) to Operational Status Effective December 10, 2018
• Nov 5: SCN18-95  Updated: Upgrade Multi-Radar, Multi-Sensor Application Effective November 7, 2018
• Nov 1: SCN18-98: Transition NWS Extreme Precipitation Monitor (EPM) to Operational Status Effective December 1, 2018
• Oct 29: SCN18-97 Updated: Change to Water Level Datum Displayed on the  Advanced Hydrologic Prediction Service (AHPS) Webpage postponed until further notice
• Oct 25:  SCN18-90  Updated: Polygon-based Snow Squall Warnings and Polygon-based Dust Storm Warnings and Dust Advisories Transition to Operational Status on or about November 1, 2018
• Oct 23: SCN18-91: Updated: Modification of AWIPS PILs in WFO Guam's product suite  effective on date to be determined
• Nov 20: SCN18-96 Updated: RTMA/URMA/RTMA-RU upgrade implementation start time changed to the 1200z cycle on December 4, 2018
• Nov 5: SCN18-95:  Updated: Upgrade Multi-Radar, Multi-Sensor Application Effective November 7, 2018
• Oct 3: SCN18-94:  Changes to Valid Time Event Codes (VTEC) and Event Tracking Numbers (ETN) for Domestic Tsunami Test Products Effective April 1, 2019
• Sep 28: SCN18-80  Updated:  Termination of County-based Flash Flood Guidance (FFG) At All Locations Effective December 31, 2018
• Sep 26: SCN18-93: WPC will assume NWS operational preparation and dissemination responsibility for the Days 3-7 portion of the U.S. Hazards Outlook starting on January 3, 2019
• Sep 26: SCN18-92:  Soliciting comments until November 4, 2018, on ending dissemination of Redbook graphic images as part of the NWS operational delivery of the CPC Days 3-14 U.S. Hazards Outlook on November 6, 2018
• Oct 23: SCN18-91: Updated: Modification of AWIPS PILs in WFO Guam's product suite  effective on date to be determined
• Oct 25:  SCN18-90  Updated: Polygon-based Snow Squall Warnings and Polygon-based Dust Storm Warnings and Dust Advisories Transition to Operational Status on or about November 1, 2018Sep 21: SCN18-36 Update: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Update to NDGD NWS Web Service: Effective October 23, 2018
• Sep 20: SCN18-89:  Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at Barrow, Alaska, on or after October 20, 2018
• Sep 11: SCN18-88: Upgrade of NOAA nowCOAST GIS Web Mapping Portal Effective late September 2018
• Sep 10: SCN18-77: Updated: Changes to the Global Forecast System (GFS)-based Model Output Statistics (MOS) guidance, effective on or about October 3, 2018
• Sep 10: SCN18-76: Updated: Changes to Ensemble Kernel Density Model Output Statistics (EKDMOS) effective October 3, 2018
• Sep10: SCN18-70: Updated: To include datum information for Koror. NWS Upper Air Station in Koror, Palau, to Use GPS Lockheed Martin LMS-6 403 MHz Radiosonde with the Lockheed Martin Groundstation (LMG) starting on or about August 11, 2018
• Aug 31: SCN18-87: Testing of GOES-17 Advanced Baseline Imager (ABI) Mode 6 Imagery on the Satellite Broadcast Network (SBN or NOAAPort), effective September 10-21, 2018
• Aug 30: SCN18-86: NWS Upper Air Station in Boise, ID, to Use GPS Lockheed Martin LMS-6 403 MHz Radiosonde with the Lockheed Martin Groundstation (LMG) starting on or about September 5, 2018
• Aug 24: SCN18-85: Addition of GOES-17 Imagery to the Satellite Broadcast Network effective August 28, 2018
• Aug 23: SCN17-77 Updated: NWS Hazard Simplification Project: Lake Effect Snow Warning Consolidation Expanded Nationwide effective October 15, 2018
• Aug 20: SCN18-67 Updated: Changes to the radiofacsimile broadcast schedules from the Boston, MA; Pt. Reyes, CA; and Kodiak, AK, effective September 19, 2018
• Aug 16: SCN18-84: Corrections to Gridded Binary Version 2 (GRIB2) Encoding Parameters for National Digital Forecast Database (NDFD) Products Effective October 30, 2018
• Aug 16: SCN18-83: Availability of Standard Hydrometeorological Exchange Format (SHEF) for NOS Water Level Data Relative to Mean Higher High Water (MHHW) effective immediately
• Aug 16: SCN18-82: WSR-88D Low Elevation Angle to be Implemented at KBUF Buffalo, NY, on or around October 9, 2018
• Aug 13: SCN18-81: Mixed Case messaging for 6 to 10 day, 8 to 14 day, and U.S. hazards outlooks effective October 24, 2018
• Aug 13: CANCELLED: Modification of AWIPS PILs in WFO Guam's product suite September 11, 2018  
• Sep 28: SCN18-80  Updated:  Termination of County-based Flash Flood Guidance (FFG) At All Locations Effective December 31, 2018
• Nov 28: SCN18-78: Update: Correction of the GRIB2 encoding of the Probability of Thunder in the experimental National Blend of Models guidance (NBM) effective December 05, 2018, and the request for comments
• Aug 9: SCN18-77: Updated: Changes to the Global Forecast System (GFS)-based Model Output Statistics (MOS) guidance, effective on or about October 3, 2018
• Aug 9: SCN18-76: Updated: Changes to Ensemble Kernel Density Model Output Statistics (EKDMOS) effective October 3, 2018
• Aug 6: SCN18-75: Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at Bethel, Alaska, Effective on or about September 15, 2018
• Aug 2: SCN18-71 Updated: Change in the METAR code for the United States regarding hail reporting effective September 13, 2018
• Aug 2: SCN18-74: Transition NDFD 3 km Alaska Region (AR) Gridded Forecasts to Operational Status Effective August 30, 2018
• Jul 23: SCN18-72: UPDATED URGENT: Possible Radiosonde Data Interruptions at Hilo and Lihue, Hawaii Effective on July 24-25, 2018
• Jul 23: SCN18-73: Service Transfer of Lawrence and Randolph counties, AR, to the Little Rock NWS Weather Forecast Office Effective October 2, 2018
• Jul 16: Updated:  To include datum information for Koror. NWS Upper Air Station in Koror, Palau, to Use GPS Lockheed Martin LMS-6 403 MHz Radiosonde with the Lockheed Martin Groundstation (LMG) starting on or about August 11, 2018
• Jul 5: SCN18-69: Add Jason-3 Satellite Marine Altimetry Products to the Satellite Broadcast Network (SBN or NOAAPort) Effective July 17, 2018
• Jul 2: SCN18-68: Termination of Aviation Weather Observations from WSO Koror, Republic of Palau Effective July 31, 2018 
• Jun 20: SCN18-51 Updated: Climatology Calibrated Precipitation Analysis (CCPA) Changes: Effective July 18, 2018
• Jun 20: SCN18-50 Updated: Upgrade of GEFS/NAEFS Bias-Corrected and Downscaled Products: Effective July 18, 2018
• Jun 18: SCN18-66: Transition of NOAAPORT Geostationary Operational Environmental Satellite-16 (GOES-16) Imagery to Fixed Grid Effective June 19, 2018
• Jun 18: SCN18-65: Upgrading National Ocean Service (NOS) Operational Forecast Systems for the Great Lakes Effective July 16, 2018
• Jun 18: SCN18-64: Transfer of Open Lake Forecast and Open Lake Watches, Warnings and Advisory Responsibility for Lake Michigan from WFO Chicago to WFO Milwaukee Effective September 5, 2018
• Jun 18: SCN18-45 Updated: WSR-88D Low Elevation Angle Field Test to Begin on or around September 17, 2018, at Medford,  OR and San Francisco, CA
• Jun 15: SCN18-53 Updated: Changes to Ensemble Kernel Density MOS (EKDMOS) effective July 18, 2018
• Jun 15: SCN18-63: Use of Mixed Case Text/95 ASCII Character Set in Selected NWS Weather Prediction Center Forecast Discussion Products Effective July 24, 2018
• Jun 8: SCN17-120: Updated: GOES-14 Emergency Managers Weather Information Network Broadcast Available on or before December 11, 2017
• Jun 8: SCN18-62: Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at St. Paul, Alaska, Effective on or about July 1, 2018
• Jun 8: SCN18-61: Minor Adjustment to Storm Prediction Center (SPC) Watch Hazard Probabilities Product, Effective July 18, 2018
• Jun 8: SCN18-60: Upgrade Hurricane Weather and Research Forecast (HWRF) Model: Effective July 9, 2018
• Jun 8: SCN18-59: Upgrade the Hurricanes in a Multi-scale Ocean-coupled Non-hydrostatic (HMON) Model: Effective July 9, 2018
• May 31: SCN18-58:Upgrade to the RAP and HRRR Analysis and Forecast System: Effective July 11, 2018
• May 31: SCN18-57: Additions and Changes to the BUFR station lists for the NAM, GFS, RAP, HRRR, SREF and Hi-ResW Effective July 11, 2018
• May 30: SCN18-56: Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at Yakutat, Alaska Effective on or about June 10, 2018
• May 30: SCN18-53 Updated: Changes to Ensemble Kernel Density MOS (EKDMOS) effective July 2, 2018
• May 28: SCN18-55: Change of Heat Advisory Thresholds across Upstate New York and Northern New England Effective June 1, 2018
• May 24: SCN18-54: Discontinuation of the Precipitation Forecast (AGF) for Hawaii effective June 25, 2018
• May 24: SCN18-54: Discontinuation of the Precipitation Forecast (AGF) for Hawaii effective June 25, 2018
• May 17: SCN18-49 Updated: Discontinuation of several NWS NCO Websites and relocation of others effective June 18, 2018
• May 17: SCN18-52: Removal of drought information from the U.S. Hazards Outlook starting with the July 25, 2018, release
• Jun 20: SCN18-51 Updated: Climatology Calibrated Precipitation Analysis (CCPA) Changes: Effective July 18, 2018
• Jun 20: SCN18-50 Updated: Upgrade of GEFS/NAEFS Bias-Corrected and Downscaled Products: Effective July 18, 2018
• May 15: SCN18-19 Updated: Format for the Reconnaissance Vortex Data Message changing on or around June 1, 2018
• May 17: SCN18-49 Updated: Discontinuation of several NWS NCO Websites and relocation of others effective June 18, 2018
• May 10: SCN18-47 Updated: Consolidate WPC Quantitative Precipitation Discussion and Excessive Rainfall Discussion, Effective June 5, 2018
• May 1: SCN18-48: Public county shapefile renaming for WFO Newport/Morehead City, NC, effective July 10, 2018
• Apr 27: SCN18-46: Use of Above Ground Level in the Coastal Hazard Message Effective On or Around May 31, 2018
• Apr 26: SCN18-45: WSR-88D Low Elevation Angle Field Test to begin on or around July 2, 2018, at Medford, OR, and San Francisco, CA
• Apr 24: SCN18-44: CPHC will discontinue National Tropical Cyclone Watch/Warning products (TCV) effective on or about June 1, 2018
• Apr 24: SCN18-43: Changes to city name for Barrow, AK, effective for NWS products and services on or about August 15, 2018
• Apr 20: SCN18-42: Approval of Service Description Document describing NWS Impact- based Decision Support Services effective April 20, 2018
• Apr 17: SCN18-41: Changes to Public Forecast Zones for WFO Pocatello,ID, effective July 10, 2018
• Apr 13: SCN18-19 Updated: Format for the Reconnaissance Vortex Data Message changing on or around May 15, 2018
• Apr 13: SCN18-40: The Tropical Cyclone Marine Danger Graphic from the CPHC will match the NHC Danger Graphic effective on or about June 1, 2018
• Apr 13: SCN18-13 Updated: Implementing improved public and fire zone coverage for WFO Brownsville/Rio Grande Valley, TX, effective May 1, 2018
• Apr 13: SCN17-126 Updated: Implementing improved public and fire zone coverage for the coastal counties along the middle Texas Coast Effective May 1, 2018
• Apr 13: SCN18-12 Updated: Changes in fire and public zones for WFO Melbourne, FL, Effective May 1, 2018
• Apr 11: SCN18-39: Arrival of Tropical-Storm-Force Winds Graphics become operational on or around May 15, 2018
• Apr 11: SCN18-38: WFOs to be allowed to issue Coastal Hazard Message, Special Weather Statements, and Surf Zone Forecast products during Tropical Cyclone events effective on or about May 31, 2018
• Apr 10: SCN18-37: Changes to the Boundaries of Fire Weather Forecast Zones in Western Wyoming Effective June 25, 2018
• Apr 10: SCN17-35 Updated: Changes to Access, Planned Termination of Common Alerting Protocol version 1.1, and Operational Implementation of Common Alerting Protocol Version 1.2 no sooner than July 1, 2018
• Apr 6: SCN18-12: Updated: Changes in fire and public zones for WFO Melbourne, FL, Effective May 1, 2018
• Apr 4: SCN18-35: New TAF service for Hattiesburg/Laurel Regional Airport (KPIB) in Moselle, MS, effective July 19, 2018
• Apr 3: SCN18-31 Updated: Inclusion of Minor Additions to SPC Convective Outlook Text Products effective April 26, 2018
• Apr 2: SCN18-34: Use of Mixed Case Text/95 ASCII Character Set in Selected WPC Forecast Discussion Products Effective May 2, 2018
• Apr 2: SCN18-33: Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at Annette, AK, Effective on or about May 1, 2018
• Mar 29: SCN18-32: Changes to Southeast Alaska Climate Products Effective on or about May 1, 2018
• Mar 27: SCN17-122 Updated: Changes in Fire and Public Zones for NWS Weather Forecast Office Jacksonville, FL, St. Johns and Flagler Counties, Effective May 1, 2018
• Apr 3: SCN18-31 Updated: Inclusion of Minor Additions to SPC Convective Outlook Text Products effective April 26, 2018
• Mar 27: SCN18-22 Updated: Experimental grids for the 0.25 inch (~6 mm) threshold of the Day 4-7 Winter Weather Outlook will become an operational element in the NDFD for the CONUS effective on or about April 3, 2018
• Mar 23: SCN18-30: WSR-88D Mid-Volume Rescan of Low-Level Elevations Field Test to Begin on or around May 14, 2018
• Mar 20: SCN17-101: Updated: Changes to LAMP station-based and gridded guidance effective January 25, 2018
• Mar 15: SCN18-29: Updated: Mixed Case Messaging for Seasonal Hurricane Outlook in AWIPS in Late May 2018
• Mar 14: SCN18-29: Mixed Case Messaging for Seasonal Hurricane Outlook in AWIPS in Late May 2018
• Mar 9: SCN18-28: Ending TAFs at the Gage, OK, (KGAG) and Hobart, OK, (KHBR) effective March 21, 2018
• Mar 9: SCN18-27: Implementation of TAF Service for Modesto (KMOD) and McClellan (KMCC), CA, Effective May 31, 2018
• Mar 9: SCN18-26: Four NWS WFOs will stop issuing local tropical cyclone forecast products effective on or about June 1, 2018
• Mar 9: SCN18-25: Four NWS WFOs will begin issuing tropical cyclone forecast products effective on or about June 1, 2018
• Mar 8: SCN18-24: Transition of Manual Radiosonde Observations to Automated Radiosonde Observations at Fairbanks, Alaska, WMO# 70261 Effective on or about April 1, 2018
• Mar 6: SCN18-23: Discontinuation of the MRX Tennessee Basin Lake Stages and Forecasts Effective April 06, 2018
• Feb 27: SCN17-114 Updated: Resumption of overnight mesoscale precipitation and model diagnostics products during the warm season from WPC Effective March 12, 2018
• Mar 27: SCN18-22 Updated: Experimental grids for the 0.25 inch (~6 mm) threshold of the Day 4-7 Winter Weather Outlook will become an operational element in the NDFD for the CONUS effective on or about April 3, 2018
• Feb 23: SCN18-21: Transition of Experimental WPC Day 4-7 Web-based Winter Weather Outlook to operational status on or about March 27, 2018
• Feb 23: SCN18-20: NHC and CPHC to begin issuing 48-hour 64-knot wind radii forecasts effective on or around May 15, 2018
• May 16: SCN18-19 Updated: Format for the Reconnaissance Vortex Data Message changing on or around June 1, 2018
• Feb 23: SCN18-18: Changes to Tropical Cyclone Public Advisory products beginning on or around May 15, 2018
• Feb 12: SCN18-17: Add GOES-East Level 2 Derived Products to the SBN or NOAAPort effective February 28, 2018
• Feb 6: SCN18-16: Upgrade of National Water Model Effective March 6, 2018
• Feb 2: SCN18-15: Changes in fire and Public zones for NWS Weather Forecast Office Houston, TX, effective May 1, 2018
• Feb 2: SCN18-14: Changes in Fire and Public Zones for WFO Amarillo, TX, effective May 1, 2018
• Apr 13, 2018: SCN18-13 Updated: Implementing improved public and fire zone coverage for WFO Brownsville/Rio Grande Valley, TX, effective May 1, 2018
• Apr 13, 2018: SCN18-12 Updated: Changes in fire and public zones for WFO Melbourne, FL, Effective May 1, 2018
• Feb 1: SCN18-11: Implementation of TAF Service for Battle Mountain Airport (KBAM) in Nevada effective April 24, 2018
• Feb 1: SCN18-10: NWS West Gulf RFC will discontinue issuing its text Hydrometerological Discussion Product effective March 1, 2018
• Jan 26: SCN18-09: Termination of the National Convective Weather Diagnostic and Forecast Product on March 31, 2018
• Jan 26: SCN17-117 Updated: Transition to operational status of offshore and high seas gridded forecasts from the NHC TAFB and the offshore gridded forecasts from the OPC in the Atlantic Basin effective February 6, 2018
• Jan 25: SCN18-08: Termination of Ensemble Kernel Density MOS (EKDMOS) dissemination over the SBN effective April 12, 2018
• Jan 24: SCN17-105 Updated: RTMA, URMA and NAM DNG upgrade and introduction of RTMA with Rapid Updates effective February 7, 2018
• Jan 24: SCN18-07: Use of mixed-case text/95 ASCII character set and removal of coded Isohyet Points in the Quantitative Precipitation Forecast Discussion effective February 26, 2018
• Jan 19: SCN17-112 Updated: Polygon-based Snow Squall Warnings to begin on or about January 31, 2018, for select offices and Polygon-based Dust Storm Warnings and Dust Advisory Product Operational Demonstration at select WFOs on or about June 20, 2018
• Jan 18: SCN18-06: Changes to the surface analyses and surface forecast charts produced by the OPC, TAFB and WFO Honolulu and addition of 72-hour surface and wind/wave forecast charts by OPC effective March 7, 2018
• Jan 12: SCN17-111 Final Update: Change in Satellite Broadcast Network (SBN) Effective from December 5, 2017, to January 16, 2018
• Jan 12: SCN18-05: Implementation of New Extratropical Surge and Tide Operational Forecast System for Micronesia Effective February 13, 2018
• Jan 12: SCN18-04: Correction to Global Forecast System (GFS) Model Station Time Series in the Binary Universal Form for Representation of Meteorological Data (BUFR) Output Effective January 10, 2018
• Jan 5: SCN18-03: Implementation of temporary TAF Service for Minnesota sites, Effective February 1-6, 2018
• Jan 4: SCN18-02: Implementation of TAF Service for Yampa Valley Regional Airport (KHDN) Hayden, CO, effective: March 21, 2018
• Jan 4: SCN17-125 Updated: Updating National Ocean Service's Oceanographic Forecast Modeling Systems Effective Jan 10, 2018
• Jan 3: SCN17-137 Updated: Assimilation of GOES-16 AMV Data into GDAS/GFS Effective January 5, 2018
• Jan 2: SCN18-01: Addition of ESTOFS Atlantic SHEF Effective January 31, 2018
• Jan 2: SCN17-84 Updated: The Nearshore Wave Prediction System (NWPS) Upgrade v1.2 will be provided over SBN and NOAAPORT on or about January 17, 2018

SCNs Issued in 2017

• Jan 3, 2018: SCN17-137 Updated: Assimilation of GOES-16 AMV Data into GDAS/GFS Effective January 5, 2018
• Dec 21: SCN17-136: Reduction in content of the Tropical Weather Discussion issued by the TAFB Effective January 21, 2018
• Dec 21: SCN17-135: Add GOES-16 Level 2 Derived Products to the SBN or NOAAPort, effective January 17, 2018
• Dec 14: SCN17-134: Supplemental Low Elevation Angle Implemented due to Urgent Mission Needs at KMUX WSR-88D San Francisco, CA on or about December 26, 2017
• Dec 14: SCN17-133: Changes to SBN or NOAAPort Products Associated with GOES East Transition, Effective December 14, 2017 through January 3, 2018
• Dec 14: SCN17-132: Use of Mixed-Case Text/95 ASCII Character Set in Selected NWS Weather Prediction Center Products Effective January 23, 2018
• Dec 13: SCN17-131: Discontinuation of the Albuquerque, NM, Regional Weather Summary Effective January 11, 2018
• Dec 13: SCN17-130 Updated: Changes to NAM-based MOS Guidance, effective on or about January 23, 2018
• Dec 4: SCN17-129: Upgrade to the Global Wave Forecasting System Multi_1: Effective January 9, 2018
• Dec 4: SCN17-128: Discontinue the use of Instagram at NWS local Forecast Offices effective January 4, 2018
• Dec 4: SCN17-127: Changes to GOES/ASOS Cloud Product on SBN or NOAAPort Effective January 2, 2018
• Apr 13, 2018: SCN17-126 Updated: Implementing improved public and fire zone coverage for the coastal counties along the middle Texas Coast Effective May 1, 2018
• Jan 4, 2018: SCN17-125 Updated: Updating National Ocean Service's Oceanographic Forecast Modeling Systems Effective Jan 10, 2018
• Nov 30: SCN17-124: Effective immediately, National Data Buoy Center Coastal-Marine Automated Network (C-MAN) Station TTIW1 on Tatoosh Island, WA, has been disestablished
• Nov 29: SCN17-123: Termination of Earthquake Report Messages effective on January 2, 2018
• Mar 27, 2018: SCN17-122 Updated: Changes in Fire and Public Zones for NWS Weather Forecast Office Jacksonville, FL, St. Johns and Flagler Counties, Effective May 1, 2018
• Nov 27: SCN17-121: Implementing enhanced Gulf of Mexico Harmful Algal Bloom Bulletins and Conditions Reports Effective December 11, 2017
• Nov 22: SCN17-120: GOES-14 Emergency Managers Weather Information Network Broadcast Available on or before December 11, 2017
• Nov 21: SCN17-119: Discontinuing experimental text products used in the creation of the Tampa Bay Marine Channels Forecast effective December 27, 2017
• Nov 20: SCN17-118: WSR-88D RDA/RPG Build 18.0 Beta Test Scheduled to Begin January 2018
• Jan 26, 2018: SCN17-117 Updated: Transition to operational status of offshore and high seas gridded forecasts from the NHC TAFB and the offshore gridded forecasts from the OPC in the Atlantic Basin effective February 6, 2018
• Nov 8: SCN17-116: Use of Mixed-Case Text/95 ASCII Character Set in selected marine text products effective December 12, 2017
• Dec 6: SCN17-115 Updated: Discontinuation of several NWS Southern Region Websites effective Dec 5, 2017
• Feb 27, 2018: SCN17-114 Updated: Resumption of overnight mesoscale precipitation and model diagnostics products during the warm season from WPC Effective March 12, 2018
• Oct 31: SCN17-113: Temporary Weather Radar Service Change for San Juan, Puerto Rico, Effective October 30, 2017
• Dec 19: SCN17-112 Updated: Polygon-based Snow Squall Warnings, and Polygon-based Dust Storm Warnings and Dust Advisory Product Operational Demonstration to begin on or about January 16, 2018, at select WFOs
• Jan 12, 2018: SCN17-111 Final Update: Change in Satellite Broadcast Network (SBN) Effective from December 5, 2017, to January 16, 2018
• Oct 19: SCN17-110: Update on Changes to Access, Planned Termination of Common Alerting Protocol version 1.1, and Operational Implementation of Common Alerting Protocol Version 1.2 Effective on or after March 1, 2018
• Oct 12: SCN17-109: Degraded HFFAX Transmissions Effective Immediately
• Dec 4: SCN17-108 Updated: Implementation of new Oceanographic Forecast Modeling System for the Gulf of Maine Effective January 3, 2018
• Oct 6: SCN17-107: Extending the Terminal Aerodrome Forecast (TAF) validity period at 11 Airport from 24 hours to 30 hours effective December 4, 2017
• Sep 22: SCN17-106: Upgrade to High Resolution Ensemble Forecast (HREF) and High-Resolution Window (HIRESW) Effective November 1, 2017
• Jan 24: SCN17-105 Updated: RTMA, URMA and NAM DNG upgrade and introduction of RTMA with Rapid Updates effective February 7, 2018
• Sep 19: SCN17-104: Global Ensemble Forecast System (GEFS) SST Replacement Effective September 26, 2017
• Sep 19: SCN17-103: Additional Issuance of WPC Probabilistic Winter Precipitation Forecast Guidance Effective October 25, 2017
• Sep 19: SCN17-102: New Fire and Public Forecast Zones and Boundary Changes for Horry County in northeast South Carolina Effective December 5, 2017
• Mar 20: SCN17-101: Updated: Changes to LAMP station-based and gridded guidance effective January 25, 2018
• Sep 13: SCN17-100: Changes to the WPC Excessive Rainfall Outlook Effective October 13, 2017
• Sep 5: SCN17-99: Changes to 500mb forecasts provided by the Ocean Prediction Center and ceasing production of a small suite of products effective November 13, 2017
• Sep 1: SCN17-98: Termination of Common Alerting Protocol Version 1.1 CAP (v1.1) to be No Sooner than November 1, 2017
• Aug 31: SCN17-97: Change to Radiosonde Observations (RAOB) at Kodiak, AK, WMO# 70350 effective on or about October 1, 2017
• Aug 29: SCN17-96: Discontinuation of Tides On Line (TOL) Coastal Observation Product at NOS/CO-OPS Effective October 16, 2017
• Aug 18: SCN17-95: NWS Test of Alternately-Mapped GOES-16 Imagery, effective September 6, 2017
• Aug 18: SCN17-94: Update NWM Processing of Streamflow Observations Effective August 22, 2017
• Sep 18: SCN17-93 Updated: Removal of the Real Time Global 0.5 degree SST Effective October 2, 2017
• Aug 8: SCN17-92: Implementing improved marine zone coverage for coastal waters along the Florida Panhandle effective December 5, 2017
• Jul 28: SCN17-91: EMWIN GOES-East satellite broadcast signal and file format changes effective November 2017
• Jul 27: SCN17-90: Impact Based Warnings (IBW) to Become Operational at NWS Pacific Region Offices Effective October 2, 2017
• Jul 25: SCN17-89: Termination of CONUS Aviation Area Forecast Effective October 10, 2017
• Dec 5: SCN17-88 Updated: Decommissioning of the Centralized Automated Data Acquisition System Effective March 30, 2018
• Jul 11: SCN17-87: Operational Implementation of Aviation Surface Forecast and Aviation Cloud Forecast Graphics Effective July 10, 2017
• Jul 10: SCN17-86: Sea Surface Temperature change to the RAP and HRRR Effective July 12, 2017
• Jul 10: SCN17-85: Change in format of Climate Prediction Center, Extended Range (6-10 day and 8-14 day) Outlooks Effective August 1, 2017
• Nov 27: SCN17-84 Updated: The Nearshore Wave Prediction System (NWPS) Upgrade v1.2 will be provided over SBN and NOAAPORT on or about January 10, 2018
• Jul 31: SCN17-83 Updated: Implementation of the new Hurricanes in a Multi-scale Ocean-coupled Non-hydrostatic (HMON) Model Version 1.0.0: Effective August 15, 2017, and request for comments
• Jun 29: SCN17-82: Implementation of Terminal Aerodrome Forecast (TAF) service for the Aurora, OR, State Airport (KUAO), effective September 12, 2017
• Jun 27: SCN17-81: Changes to RWRTX Products in Texas Effective July 26, 2017
• Aug 3: SCN17-80: Updated Hurricane Weather and Research Forecast (HWRF) Model Changes: Effective August 2, 2017, and request for comments
• Jun 22: SCN17-79: NWS transferring forecast and warning responsibility for METAREA XVI to Directorate of Hydrography and Navigation of the Navy of Peru (DHN) Effective June 30, 2017
• Jun 16: SCN17-78: Updated: Termination of IDP-GIS RFC_GRID_QPF map service and suspension of the rfc_dly_qpe services data effective immediately
• Sep 7: SCN17-77 Updated: NWS Hazard Simplification Project: Implementation of Consolidated and Re-formatted NWS Winter Messaging Products on October 2, 2017
• Jun 15: SCN17-76: Implementation of the Tampa Bay Marine Channels Forecast (TBMCF) at NOS/CO-OPS, effective August 1, 2017
• Jun 15: SCN17-75: Upgrade to the Great Lakes Wave System Effective July 25, 2017
• Sep 5: SCN17-74 Updated: The Ocean Prediction Center is upgrading its website effective September 26, 2017
• Jun 15: SCN17-73: Add Geostationary Operational Environmental Satellite-16 (GOES-16) Level 2 Derived Products to the Satellite Broadcast Network (SBN or NOAAPORT), effective June 14, 2017
• Jun 13: SCN17-72: Discontinue Experimental Holdover Threat Index Product for the Elko Weather Forecast Office Effective July 13, 2107
• Jun 13: SCN17-71: Discontinue Hurricane Wave (multi_2) Model: Effective July 11, 2017
• Jun 13: SCN17-70 Updated: Transition to Operational Status for the experimental International Arrival and Departure Gate Forecasts Effective July 13, 2017
• Jun 13: SCN17-69 Updated: Addition of new NWS Storm Surge Watches and Warnings and changes to symbology used to display NWS Tropical Cyclone Advisory Forecast Tracks, Cone of Uncertainty, and Coastal Tropical Cyclone Watches/Warnings on NOAA's nowCOAST effective on or about June 19, 2017
• Jun 9: SCN17-68: Upgrade to Global (multi_1) Wave Model Point Data on NOAAPORT and Web Services: Effective July 19, 2017
• Aug 10: SCN17-67 Updated: GFS Upgrade: Include information about the 0.5 degree GFS pressure GRIB files being temporarily available on the NWS Web Services until August 22, 2017
• Jun 8: SCN17-66: One NWS Upper Air Station to Use GPS Lockheed Martin LMS-6 403 MHz Radiosonde with the Lockheed Martin Groundstation (LMG) starting on or around June 29, 2017
• Jun 7: SCN17-65: Discontinuing Experimental Southern Region Emergency Response Tool June 19, 2017
• Jun 5: SCN17-64: Upgrade of 2.5 km Gridded Model Output Statistics Guidance over the CONUS to operational status on or about July 18, 2017
• Nov 6: SCN17-63 Updated: Extra-Tropical Storm Surge (ETSS) model upgrade and the first version of Probabilistic Extra-Tropical Storm Surge (P-ETSS) model: Effective December 6, 2017
• Jun 26: SCN17-62 Updated: Delay in the NWS Point Forecast Application implementation of Storm Surge Watches and Warnings until June 26, 2017
• May 31: SCN17-61: Add GOES-16 Level 2 Derived Products to the Satellite Broadcast Network (SBN or NOAAPORT), effective May 31, 2017
• May 30: SCN17-60: Change to depiction of sustained winds around tropical cyclones on Ocean Prediction Center forecast charts Effective Thursday June 30, 2017
• Oct 20: SCN17-59 Updated: Slight adjustments to SBN and NOMADS transmission of National Blend of Models (NBM) guidance and bug fix effective on October 10, 2017
• May 25: SCN17-58: Updated: Use of Mixed-Case Text/95 ASCII Character Set in Weather Forecast Office (WFO) Tropical Cyclone
  Local Products Effective on or about June 26, 2017
• Aug 10: SCN17-57: Change to the census area name and the Federal Information Processing Series (FIPS) code for Wade Hampton Census Area, AK, effective on June 13, 2017
• Aug 14: SCN17-56: Updated: Discontinuing Experimental Adaptable NWS Forecast/Warning/Observation Widget and Web Page on October 3, 2017
• May 2: SCN17-55: Air Quality Prediction Update: Effective June 13, 2017
• Apr 28: SCN17-54: HYSPLIT Wildfire Smoke Prediction Update: Effective June 13, 2017
• Apr 27: SCN17-53: Change in Fire Weather Forecast Zones for WFO Portland, OR, in Washington and Oregon, Effective July 11, 2017
• May 18: SCN17-52 Updated: Display changes to the National Forecast Chart effective May 25, 2017
• Apr 18: SCN17-51: Impact Based Warnings for Special Marine Warnings (SMW) and Marine Weather Statements (MWS) for WFOs Honolulu and Guam will become operational May 18, 2017
• Apr 18: SCN17-50: Use of Mixed-Case Text/95 ASCII Character Set in selected marine text products effective June 1, 2017
• Apr 17: SCN17-49: Changes to the appearance of the graphics accompanying Tropical Cyclone Advisory packages effective on or about May 15, 2017
• Apr 14: SCN17-48: Experimental Weeks 3-4 Temperature Outlook will become Operational effective May 15, 2017
• Apr 10: SCN17-47: Termination of Three National Hurricane Center Guidance Messages Effective May 10, 2017
• Dec 21: SCN17-46 Updated: Delayed Implementation of Impact Based Warnings (IBW) at NWS Alaska Region Offices February 21, 2018
• Jun 6: SCN17-45 Updated: Discontinue GFDL Hurricane Model: Effective July 5, 2017
• Apr 3: SCN17-44: Cessation of legacy U.S. METAR and TAF collectives/bulletins that are sent to the international community on May 8, 2017
• Apr 3: SCN17-43: Alaska Aviation Weather Unit and Volcanic Ash Advisory Center Will Migrate to a New Layout on Their Web Home Pages Effective May 10, 2017
• Mar 31: SCN17-42: Adding Public Information Statements (PNS) to the National Hurricane Center product suite effective May 15, 2017
• May 3: SCN17-41 Updated: Upgrade of National Water Model Effective May 8, 2017
• Mar 30: SCN17-40: Add Experimental Aviation Surface Forecast and Aviation Cloud Forecast Graphics, effective March 30, 2017
• Mar 30: SCN17-39: Depiction of Potential Tropical Cyclones on the Unified Surface Analysis and Forecast Marine Radiofax Charts effective on or around May 15, 2017
• Mar 29: SCN17-38: Changes in Air Quality Alert for Middle Tennessee and South Central Kentucky Effective April 27, 2017
• Mar 31: SCN17-37 Updated: Minor modification of IDP-GIS WPC_QPF map Service to remove time-enable layers effective April 13, 2017
• Mar 27: SCN17-36: The validity period for four Terminal Aerodrome Forecast (TAF) locations are extending from 24 hours to 30 hours effective June 13 and June 29, 2017
• Apr 10, 2018: SCN17-35 Updated: Changes to Access, Planned Termination of Common Alerting Protocol version 1.1, and Operational Implementation of Common Alerting Protocol Version 1.2 no sooner than July 1, 2018
• Mar 30: SCN17-34 Update: Extratropical Surge and Tide Operational Forecast System for the Atlantic and Gulf Coasts (ESTOFS Atlantic) Update: Effective April 25, 2017
• Mar 20: SCN17-33: Expansion of the CPHC Tropical Weather Outlook to 5 Days and Introduction of a 5-Day Companion Graphic to Match Products Issued by the NHC
• May 30: SCN17-32 Updated: Change to Available Formats of Precipitation Products on the AHPS Precipitation Download Webpage Effective on or After June 19, 2017
• Mar 14: SCN17-31: Operational Implementation of Aviation Weather Center Experimental Graphical Forecasts for Aviation Effective April 13, 2017
• Mar 14: SCN17-30: Updated: Changes to the Graphical Tropical Weather Outlook (GTWO) issued by the National Hurricane Center effective on or around May 15, 2017
• Mar 10: SCN17-29: Discontinuing the Experimental Spanish Language Hurricane Local Statement issued by the NWS WFO in Brownsville, TX, Effective April 10, 2017
• Mar 9: SCN17-28: Changing criteria for issuing tropical cyclone watches and warnings to include certain land-threatening disturbances that are not yet tropical cyclones effective on or about May 15, 2017
• Mar 9: SCN17-27: Discontinuation of the experimental Hurricane Threats and Impacts Graphics Web Interface effective April 10, 2017
• Apr 10: SCN17-26 Update: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrades: Effective April 18, 2017
• Mar 3: SCN17-25: Four NWS Southern Region WFOs will stop issuing tropical cyclone forecast products effective on or about June 1, 2017
• Mar 1: SCN17-24: Add GOES-16 Imagery to the SBN or NOAAPORT, effective March 2, 2017
• Feb 27: SCN17-23: Expansion of the tropical cyclone watch/warning information available in the National Tropical Cyclone Watch/Warning (TCV) products issued for Atlantic tropical cyclones effective on or around June 1, 2017
• Mar 31: SCN17-22 Updated: Changes to LAMP and Gridded LAMP ceiling and visibility guidance and to the dissemination of GLMP wind gusts and probabilities of ceiling height and visibility effective April 3, 2017
• Apr 10: SCN17-21 Updated: Modification of NOAA's nowCOAST map services to provide maps of NOAA/NESDIS Global Mosaic of Geostationary Satellite Imagery and mosaic of shortwave infrared imagery from NOAA GOES EAST and WEST effective April 17, 2017
• Feb 22: SCN17-20: Upgrade to WPC Probabilistic Quantitative Precipitation Forecasts over CONUS effective May 10, 2017
• Feb 21: SCN17-19: Changes to the Mass News Disseminator Header Block for mixed-case tropical products effective on or around May 15, 2017
• Feb 23: SCN17-18 Updated: Grid points change for the GFS 20km Pacific Region over NOAAPORT: Effective March 22, 2017
• Mar 27: SCN17-17: RTMA and URMA Upgrade: Effective May 2, 2017
• Feb 15: SCN17-16 Update: Addition of Tropical Cyclone Storm Surge Watches and Warnings for the Atlantic and Gulf Coasts of the Contiguous United States effective on or around June 1, 2017
• Feb 14: SCN-17-16: Addition of Tropical Cyclone Storm Surge Watches and Warnings for the Atlantic and Gulf Coasts of the Contiguous United States effective on or around June 1, 2017
• Feb 14: SCN17-15: Changes to the ASOS Augmentation and Backup Responsibilities in Alaska and Pacific Regions starting March 15, 2017
• Feb 10: SCN17-14: Emergency Change to the HiResW snow Initialization: Effective February 14, 2017
• Feb 7: SCN17-13: Planned Decomissioning of cell.weather.gov Effective March 7, 2017
• Mar 29: SCN17-12 Updated: Resolution upgrade for WPC Quantitative Precipitation Forecasts for CONUS effective April 3, 2017
• Mar 14: SCN17-11 Updated: Removal of the NCEP RTOFS Atlantic Forecasting System Effective March 21, 2017
• Feb 3: SCN17-10: NGAC Aerosol Forecast System Upgrade Effective March 7, 2017
• Jan 30: SCN17-09: Discontinuing the Experimental Southern Region (SR) Experimental SR Mapping Application Program Interface (API ) Widget effective immediately
• Jan 30: SCN17-08: Cancelled: Impact Based Warnings (IBW) to become operational at all CONUS NWS WFOs on February 28, 2017
• Jan 30: SCN17-07: Experimental waterspout coding to Special Marine Warnings (SMW) and Marine Weather Statements (MWS) for all marine WFOs in the CONUS will become Operational effective April 4, 2017
• Jan 25: SCN17-06: Modification of NOAA's nowCOAST map services effective February 28, 2017
• Jan 24: SCN17-05: Western Region Web Changes: New Layout, and Secure Communications effective April 18, 2017
• Jan 23: SCN17-04: WFO Honolulu will begin issuing the Hurricane Local Watch/Warning (TCV) product on an operational basis effective June 1, 2017
• Jan 23: SCN17-03: Changes to the Hurricane Local Statement (HLS) issued by WFO Honolulu effective on or around June 1, 2017
• Jan 23: SCN17:02: Changes to Public Forecast Zones for NWS Weather Forecast Office (WFO) Phoenix, Arizona, Effective April 4, 2017
• Jan 23: SCN17-01: Change of Tsunami Break Points for California Effective February 16, 2017

SCNs Issued in 2016

• Nov 7, 2017: SCN16-57 Update: Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSR) delayed until further notice
• Dec 27. 2016: SCN16-56: NWS to merge Technical Implementation Notices (TIN) with Service Change Notices (SCN) and use Update in lieu of Corrected and Amended in notices effective January 1, 2017
• Aug 7, 2017: SCN16-55 Updated: Implementation of changes to the NWS forecast website at forecast.weather.gov on hold
• Jan 23, 2017: SCN16-54 Updated: Phase 3 Mixed-Case Text and Expanded 95 Character ASCII Character Set Use in NWS Text Products Effective February 7, 2017
• Dec 19: SCN16-53: URLs for the AHPS and OWP websites will be redirected to SSL and will only be accessible at https: domain names on or before December 31, 2016
• Nov 28: SCN16-52: Discontinuation of the Norman, OK, Regional Weather Summary and Local Cooperative Observation (Amateur Radio Weather Reports) Effective December 29, 2016
• Nov 15: SCN16-51: Changes to the websites associated with the HADS system effective December 13, 2016
• Nov 14: SCN16-50: Discontinuation of the Satellite Interpretation Message (SIM) for Hawaii, and the Significant Cloud Features Chart effective December 14, 2016
• Nov 4: SCN16-49: Change to the WMO Headers for the Observations from the NRCS Products on or After December 5, 2016
• Oct 24: SCN16-48: NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) changes for tropical cyclone watch/warning services effective June 1, 2017
• Oct 19: SCN16-47: Discontinuing Coded Cities Forecast (CCF) for WFOs in NWS Southern Region Who Issue It Effective November 22, 2016
• Oct 18: SCN16-46: Use of Mixed-Case Text/95 ASCII Character Set in NCEP Marine Interpretation Message (MIM) Products Effective November 30, 2016
• Oct 7: SCN16-45: Combination of National Tsunami Warning Center (NTWC) and Pacific Tsunami Warning Center (PTWC) Products on Single Website effective on November 07, 2016
• Sep 26: SCN16-44: Discontinuing Experimental Satellite Rainfall Graphics effective October 25, 2016
• Sep 20: SCN16-43: Use of Mixed-case Letters in Select NWS Storm Prediction Center Products Effective December 6, 2016
• Sep 20: SCN16-42: Upgrade to the Automated Flood Warning System (AFWS) Website on or after October 12, 2016
• Sep 15: SCN16-41: Termination of the NWS Automated Radar Observations and Radar Coded Message Mosaics Effective October 12, 2016
• Sep 15: SCN16-40: The Southern Region River Forecast Center Experimental Decision Support Services Webpage will be discontinued Effective September 27, 2016
• Sep 12: SCN16-39: Change to the Distribution Times of the Day 3-7 Northern Hemispheric Chart and Day 4-5 and Day 6-7 Quantitative Precipitation Forecasts (QPF) Effective October 11, 2016
• Oct 5: SCN16-38 Amended: EDIS Email Service Upgrade/Transition to start September 7, 2016 with completion by October 11, 2016
• Oct 5: SCN16-37 Amended: FTPMail Service Upgrade/Transition to start September 7, 2016 with completion by October 11, 2016
• Aug 31: SCN16-36: Tornado and Severe Thunderstorms Watches May Include Outer Marine Zones Effective September 29, 2016
• Sep 29: SCN16-35: Amended: Addition of a map service to NOAA's nowCOAST(tm) to provide access to NWS/National Hurricane Center's Potential Storm Surge Flooding Map Effective Wednesday, September 28, 2016
• Aug 30: SCN16-34: Termination of the Production of Legacy Redbook Graphics Effective October 3, 2016
• Aug 30: SCN16-33: Changes to the sea state analyses produced by the Ocean Prediction Center Effective October 3, 2016
• Aug 29: SCN16-32: The Weather Prediction Center will migrate to a new home page layout Effective September 27, 2016
• Aug 29: SCN16-31: Operational Implementation of AWC Online PIREP Submission Form Effective September 29, 2016
• Aug 26: SCN16-30: Effective immediately, National Data Buoy Center Coastal-Marine Automated Network (C-MAN) Station CHLV2 on the Chesapeake Light Tower has been disestablished
• Aug 19: SCN16-29: NWS Making Changes to Icons Associated With Tropical Cyclone Point-and-Click Forecasts effective by the beginning of the 2017 Tropical Cyclone seasons
• Aug 18: SCN16-28: Southern Region offices will migrate to a new layout on their web home pages Effective September 27, 2016
• Aug 17: SCN16-27 Corrected: New Fire and Public Forecast Zones and Boundary Changes for the Mountains of West Virginia Effective November 1, 2016
• Jul 14: SCN16-26: Mixed-Case Text and Expanded 95 ASCII Character Set Use in NWS National Tsunami Warning Center (NTWC) Text Products Effective August 16, 2016
• Jul 14: SCN16-25: Eliminate Tsunami EQI Products and Incorporate Content into TIB Products effective August 16, 2016
• Jul 12: SCN16-24: Addition of Governors Island, NY, to the Land-based "Point-and-Click" Web Display of the New York, NY, Weather Forecast Office (WFO), Effective August 11, 2016
• Jun 30: SCN16-23: Experimental Wind Speed Probabilities–Based Tropical Cyclone Danger Area Graphic to transition from experimental status to operational status effective August 1, 2016
• Jun 22: SCN16-22: NOAA DSCOVR spacecraft to replace NASA ACE at the Space Weather Prediction Center (SWPC) effective July 27, 2016
• Jul 8: SCN16-21 Amended: Change to WPC Day 1-3 Excessive Rainfall Outlooks Effective August 1, 2016
• Aug 16: SCN16-20 Amended: Phase 2 Mixed-Case Text and Expanded 95 Character ASCII Character Set Use in NWS Text Products Effective December 6, 2016
• Jun 8: SCN16-19: GPS-MET Change in Service Provider effective September 1, 2016
• May 25: SCN16-18: Experimental Potential Storm Surge Flooding Map Transitioning to Operational Status June 1, 2016
• May 18: SCN16-17: Changes to the Boundaries of Fire Weather Forecast Zones in Southwest Minnesota (MN) and Northwest Iowa (IA) Served by NWS Weather Forecast Office (WFO) Sioux Falls, South Dakota (SD), Effective June 16, 2016
• Aug 1: SCN16-16 Corrected: Termination of the NWS Weather.Noaa.Gov (WNG) Web Service effective June 15, 2016
• May 3: SCN16-15: Improved warning polygons along complex coastal boundaries effective May 10, 2016
• Apr 26: SCN16-14: Termination of Black and White Background Version of the Daily Weather Map Weekly Publication Effective Thursday, June 16, 2016
• Apr 22: SCN16-13: NWS Alaskan Region offices will migrate to a new layout on its web home pages effective July 6, 2016
• Apr 11: SCN16-12: Corrected: Use of Mixed-Case Text and Expanded 25 Character ASCII Character Sets in NWS Text Products Effective May 11, 2016
• Apr 7: SCN16-11: Use of Mixed-Case Letters in Select NWS National Central Pacific Hurricane Center Products Effective June 1, 2016
• Apr 6: SCN16-10: Legacy Aviation Weather Center webpages (ADDS) and Java applets no longer available effective June 30, 2016
• Apr 1: SCN16-09: Changes to Public Forecast Zones of Northwest California effective June 16, 2016
• Mar 14: SCN16-08: Corrected: Experimental Forecast of Reference Crop Evapotranspiration (FRET) for Short Canopy Vegetation Will Become Operational Effective April 13, 2016
• Mar 3: SCN16-07: Amended: Change to the boundaries for Charleston Harbor marine zone, effective April 5, 2016
• Feb 29: SCN16-06: Service Transfer of Fire Weather Zones ALZ014 in North Central Alabama Effective April 5, 2016
• Feb 29: SCN16-05: Use of Mixed-case letters in select NWS National Hurricane Center Products effective May 15, 2016
• Feb 3: SCN16-04: Corrected: Change for corrections to WAFS Significant Weather Charts, effective April 14, 2016
• Jan 28: SCN16-03: Change of Identifier for New York Oceanic Flight Information Region (FIR), effective April 14, 2016
• Jun 8: SCN16-02 Amended: New NWS Geospatial Web Services will be available effective June 28, 2016
  Jan 7: SCN16-01: NWS to number Public Information Statements effective January 8, 2016
  
  For older TINs, SCNs, and PNSs go to For older PNS, SCNs and TINs go to https://www.weather.gov/notification/archive

Technical Implementation Notices: 2017 (Only updated TINs after 1/1/17)

• Sep 14: TIN15-36 Amended: Upgrade to Global-Real Time Ocean Forecast System (RTOFS): Effective October 17, 2017
• Jul 6: TIN09-41: Updated Date: Turn Off Date for WSR-88D Low-Resolution Products is December 31, 2017
• Mar 20: TIN15-16 Updated: Tropical Cyclone Threat Grids in the National Digital Forecast Database will Transition to Operational Effective June 1, 2017
• Mar 13: TIN16-41 Updated: Upgrade to the NAM Forecast System and Discontinuation of Downscaled GFS by NAM Extension (DGEX) Forecast System Effective March 21, 2017
• Mar 9: TIN15-05 Updated: Modification of the National Operational Hydrologic Remote Sensing Center, (now OWP) prototype gridded Snowfall Analysis product effective March 15, 2017
• Feb 2:  TIN15-49: Updated: WSR-88D Volume Coverage Pattern Changes tentatively scheduled to deploy in Mid-October 2017
• Jan 27: TIN16-41 Updated: Upgrade to the NAM Forecast System and Discontinuation of DGEX Forecast System Effective on a date to be determined

Technical Implementation Notices: 2016

• Dec 16: TIN16-44: Aircraft Observations over South America added Effective on November 2, 2016
• Dec 12: TIN16-43: Implementation of temporary TAF Service for David Wayne Hooks Memorial Airport (DWH) Houston, TX, Effective January 23 through February 12, 2017
• Dec 12: TIN16-42: Additions and Changes to the BUFR station lists for the NAM, RAP, HRRR, SREF, and Hi-Res Windows: Effective January 10,2017
• Dec 12: TIN16-41: Upgrade to the North American Mesoscale (NAM) Forecast System and Discontinuation of Downscaled GFS by NAM Extension (DGEX) Forecast System Effective February 1, 2017
• Dec 5: TIN16-40: Earlier delivery times for HIRES Window and HREF products: Effective January 4, 2017
• Oct 26: TIN16-39: Operational Implementation of AWC Impacts TAF Board Effective November 28, 2016
• Sep 22: TIN16-38: Addition of grids for the 0.25 inch (~6 mm) threshold of Experimental Day 4-7 Winter Weather Outlook as an experimental element in the National Digital Forecast Database (NDFD) for the CONUS effective October 11, 2016
• Sep 19: TIN16-37: Washington GISC Data Center move and OpenWIS Software Upgrade: Effective September 16, 2016
• Sep 15: TIN16-36: Aircraft Observations using BUFR7 Effective December 1, 2016
• Sep 15: TIN16-35: GPS-PW changes on NCEP servers Effective Sept 27, 2016
• Dec 2: TIN16-34 Amended: Implementation of new METAR and TAF collectives for the United States, for International Distribution, effective December 8, 2016
• Oct 18: TIN16-31 Amended: Changes to GFS-based Model OutputStatistics (MOS) Guidance effective on or about November 15, 2016
• Oct 18: TIN16-32 Amended: Updates to Ensemble Kernel Density MOS (EKDMOS) effective November 15, 2016
• Oct 18: TIN16-33 Amended: Implementation of experimental National Blend of Models guidance effective November 15, 2016, and request for comments
• Aug 1: TIN16-30: Implementation of National Water Model Effective: August 16, 2016
• Jul 29: TIN16-29: Implementation of Terminal Aerodrome Forecast (TAF) services for Santa Monica, CA, (KSMO) San Bernardino, CA, (KSBD) and Camarillo, CA,(KCMA) Airports, effective October 18, 2016
• Jul 26: TIN16-28 Corrected: Transition of the 6km Alaska Forecast Grids from Experimental to Operational Status Effective August 24, 2016
• Aug 23: TIN16-27 Amended: RTMA, URMA, NAM DNG and SREF Upgrade: Effective August 23, 2016
• Aug 23: TIN16-26 Amended: Upgrade to the Rapid Refresh (RAP) and the High-Resolution Rapid Refresh (HRRR) Analysis and Forecast System Effective August 23, 2016
• Jul 14: TIN16-25: Corrected: Implementation of Terminal Aerodrome Forecast (TAF) services for Driggs-Reed Memorial, ID, Airport (KDIJ) and Ennis-Big Sky, MT, Airport (KEKS), effective September 29, 2016
• Nov 15: TIN16-24 Amended: Level III NEXRAD Data Collected from two Overseas Radars on or around January 16, 2017
• Jul 14: TIN16-23: Eight NWS Upper Air Stations to Use GPS Lockheed Martin LMS-6 403 MHz Radiosonde with the Lockheed Martin Groundstation (LMG) starting between August 15, 2016, and October 15, 2016
• Dec 7: TIN16-22 Amended: The Nearshore Wave Prediction System (NWPS) data will be provided over the SBN and NOAAPORT on or about November 17, 2016, for Western, Pacific and Alaska Region WFOs
• Jul 19: TIN16-21 Amended: Model Analysis and Guidance Website imagery product URL path change on or about August 16, 2016
• Jun 27: TIN16-20: FNMOC NAVGEM Upgrade on NCEP Servers Effective June 28, 2016
• Jun 13: TIN16-19: Change in TDWR Elevation Angles Beginning July 18, 2016
• Jun 23: TIN16-18 Amended: Hurricane Weather and Research Forecast (HWRF) Model Changes: Effective July 12, 2016
• Jun 9: TIN16-17: GFDL Hurricane Prediction System Changes: Effective July 12, 2016
• Jun 9: TIN16-16: NCEP Model Analysis and Guidance Web Page Replicating: Effective June 20, 2016
• Jul 14: TIN16-15:Amended: Changes to North American Mesoscale Model (NAM)-based Model Output Statistics (MOS) Guidance Effective August 16, 2016
• May 26: TIN16-14: Implementation of Temporary Terminal Aerodrome Forecasts (TAF) for Cuyahoga County Airport, Effective July 12-25, 2016
• Jun 10: TIN16-13 Amended: Changes to Gridded Localized Aviation Model Output Statistics Program (LAMP) Effective June 14, 2016
• Apr 14: TIN16-12: NEXRAD Level-II format at NCEI Archive Changes Scheduled To Begin June 1, 2016
• Apr 21: TIN16-11: Amended: Global Forecast Systems (GFS) Upgrade: Effective May 11, 2016
• Apr 1: TIN16-10 Corrected: URGENT ANNOUNCEMENT: Radiosonde Observations (RAOB) at Lihue, HI, return to normal operation effective May 13, 2016
• Mar 25: TIN16-09: Reset of ocean initial conditions in the operational Climate Forecast System version 2 (CFSv2) to remove Atlantic Ocean cold bias March 28, 2016
• Apr 19: TIN 16-08 Amended: Upgrading National Ocean Service's Lake Erie Operational Forecast System, Effective May 3, 2016
• Mar 14: TIN16-07: RDA/RPG Build 17.0 Beta Test Tentatively Scheduled To Begin April 4, 2016
• Apr 5: TIN16-06: Amended: Cancelled NGAC Aerosol Forecast System Effective April 5, 2016
• Jun 6: TIN16-05 Amended: Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) Model Update Effective date July 6, 2016
• Mar 17: TIN16:04 Amended: Global Forecast System (GFS) product removal from NOAAPORT: Effective March 23, 2016
• Mar 4: TIN16-03: Amended: Addition of GEFS/NAEFS Bias Corrected Products and Downscaled Products for Alaska and CONUS: Effective March 29, 2016
• Mar 4: TIN16-02: Amended: Climatology Calibrated Precipitation Analysis (CCPA) Changes: Effective March 29, 2016
• Feb 10: TIN16-01: Modifying Product Dissemination Time of the NCEP/FNMOC Combined Wave Ensemble Product (NFCENS) Effective March 14, 2016

• Nov 8, 2016: TIN09-41: Amended Date: Turn Off Date for WSR-88D Low-Resolution Products changed to October 2, 2017

For older TINs, SCNs, and PNSs go to http://www.nws.noaa.gov/os/notification/list.php