Active Western Storms; Quiet in the East

A cold weather system will produce heavy mountain snow and gusty winds across the Intermountain West and central Rockies. Windy conditions associated with this storm will produce critical fire weather threats for parts of the central High Plains and elevated threats into the south Plains. An approaching storm may produce showers with areas of heavy mountain snow on the West Coast. Read More >

LOADING...

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

River Forecasts

Temp/Precip Data

Precip Forecasts

Flood Awareness

Other Information

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

Text version for key sites (updated every 6 hours)

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.

Text forecast for key sites (updated daily each morning)

If the map below does not load, click the button next to "River Forecasts."

Temperature/Precipitation Observations

Daily Roundup (issued 10am daily)
Daily Automated Station Data (issued twice daily)
Current Conditions (updated hourly)
Precipitation Last 72 Hours
AFWS Data from MD/VA/WV
IFLOWS Data from Virginia

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
Days 4-7 Forecast Rainfall (NWS Weather Prediction Center) 7 Day Total Forecast Rainfall (NWS Weather Prediction Center) Probabilistic Rainfall (NWS Weather Prediction Center)