NWISWeb Tutorial

How to access real-time streamflow data in your watershed

Start at http://waterdata.usgs.gov/ (this link opens in a new window).

Step 1

Click the blue Real-time button.

You will get a map with colored dots that indicate current streamflow conditions (high, moderate, or low streamflows) at streamgaging stations across the nation.

Step 2

Click on your state or territory on the national map. A map will appear showing current streamflow conditions in your state.

Step 3

Click on Statewide Streamflow Table. You will get a list of gaging stations, identified by name and number, where streamflow is continually monitored. Also listed are current available data from each station. These data usually include gage height, streamflow, and a value for comparison--such as the average streamflow for that day. How do I interpret gage heights and streamflows?

Step 4

Group the Streamflow Table by Hydrologic Unit to focus on the stations in your local watershed. Click Go.

Step 5

Now, find your Hydrologic Unit Code (HUC) or watershed name. What is a HUC? Then click on individual station number(s) within your HUC to get data from that station.

For most stations, you will get a graph like the one below, which shows 7 days of real-time discharge (streamflow) data and historical data (median daily streamflows) for this station on the Cimarron River in New Mexico:

Step 6

For more data, change the default 7 days to a number up to 31, and click get data. Real-time streamflow data are available for a maximum of 31 days.

I want historical streamflow data for this station.