National Weather Service United States Department of Commerce

Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies; Heavy Rain in Guam

A storm system moving over the Rockies today will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Heavy snow expected from northwestern Wyoming into southern Montana. Ongoing heavy showers and thunderstorms from Invest 96W could result in localized flash flooding, particularly in central or southern Guam early this morning. Read More >

Baltimore/Washington Area Hydrology Page

What's NEW?
View our timeline of historic flood events in the region!
Check out the DC-area Potomac Inundation Maps!
Latest drought information

Click on a tab below to view associated information!

 

River Observations
Hover over a location to see its name. Click on any point to see information for that site.

 

River Forecasts

Hover over a location to see its name. Click on any point to see information for that site.
Scroll below the map to see major rivers at a glance.

Temperature/Precipitation Observations

Local Precipitation Forecasts
(Hover over or click/tap on the timeframes to change the image.)

 

 

QPF

National Precipitation Forecasts, Days 1 through 3 (click to enlarge)
Please note: The below forecasts represent a basin average and may not represent local maxima.

Images from the NWS Weather Prediction Center (WPC)

Day 1 Rainfall

Day 2 Rainfall

Day 3 Rainfall