Flood Watch issued July 30 at 2:43PM EDT until August 1 at 2:00AM EDT by NWS Baltimore MD/Washington DC
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of DC, including the following , District of
Columbia, Maryland, including the following areas, Anne Arundel,
Calvert, Carroll, Cecil, Central and Southeast Howard, Central and
Southeast Montgomery, Charles, Frederick MD, Northern Baltimore,
Northwest Harford, Northwest Howard, Northwest Montgomery, Prince
Georges, Southeast Harford, Southern Baltimore and St. Marys, and
northern Virginia, including the following areas, Arlington/Falls
Church/Alexandria, Central and Southeast Prince
William/Manassas/Manassas Park, Eastern Loudoun, Fairfax, Northern
Fauquier, Northwest Prince William, Southern Fauquier and Western
Loudoun.
* WHEN...From Thursday afternoon through late Thursday night.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Extensive
street flooding and flooding of creeks and rivers are possible.
* ADDITIONAL DETAILS...
- Significant flash flooding is possible. Numerous showers and
thunderstorms will develop and move across the area Thursday
afternoon into Thursday evening. Thunderstorms will be
capable of producing very heavy rain, with rainfall rates of
1 to 2 inches in 30 minutes. Widespread rainfall amounts of 1
to 2 inches are expected. Some areas could experience
multiple rounds of thunderstorms, with higher rainfall
amounts of 4 to 6 inches possible. This could result in
numerous instances of flash flooding. Showers and
thunderstorms will begin early Thursday afternoon, and the
heaviest rainfall is most likely from 3 PM to 8 PM.
- Please visit www.weather.gov/safety/flood for flood safety
and preparedness information
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
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