National Weather Service Forecast Office - Kansas City/Pleasant Hill, MO

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Pleasant Hill SKYWARN Storm Spotter Page

SKYWARN Organization in the Kansas City Area	EMWIN Weather Information via VHF
Codes for the SAME Weather Radio's	Storm Spotters Glossary
Storm Spotter Training Schedule-2004	StormSpotters Training Guide
How to Become a Storm Spotter	Safety Rules During Severe Weather
Skywarn Radio Frequencies to Monitor

Hail Diameter Size and Wind Descriptors

HAIL DIAMETER SIZE	DESCRIPTION
1/4"	Pea Size
1/2"
3/4" (Severe Criteria)	Dime Size
7/8"	Nickel Size
1"	Quarter Size
1 1/4"	Half Dollar Size
1 1/2"	Walnut or Ping Pong Ball Size
1 3/4"	Golf Ball Size
2"	Hen Egg Size
2 1/2"	Tennis Ball Size
2 3/4"	Baseball Size
3"	Teacup Size
4"	Grapefruit Size
4 1/2"	Softball Size

WIND SPEED ESTIMATE	DESCRIPTION
25-31 mph	Large branches in motion; whistling heard in telephone wires
32-38 mph	Whole trees in motion; inconvenience felt walking against the wind
39-54 mph	Twigs break off trees; wind generally impedes progress
55-72 mph	Damage to chimneys and TV antennas; pushes over shallow rooted trees
73-112 mph	Peels surfaces off roofs; windows broken; light mobile homes pushed or overturned; moving cars pushed off road
113-157 mph	Roofs torn off houses; cars lifted off ground

Send E-mail to SKYWARN Coordinator at Pleasant Hill


National Weather Service Pleasant Hill Weather Forecast Office 1803 N. 7 Hwy Pleasant Hill, MO 64080 (816) 540-6021 W-EAX.Webmaster@noaa.gov Page last modified: September 10, 2004	Disclaimer	Privacy Notice