Weather Forecast for Washington DC

...The combination of a slow moving frontal zone with a tropical air mass in place will increase the risk of flash flooding through this evening... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Washington DC, and portions of Maryland, including the following areas, Anne Arundel, Calvert, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Frederick, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore, St. Marys and Washington, Virginia, including the following areas, Albemarle, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Clarke, Culpeper, Eastern Loudoun, Fairfax, Frederick, Greene, King George, Madison, Northern Fauquier, Northern Virginia Blue Ridge, Northwest Prince William, Orange, Page, Rappahannock, Shenandoah, Southern Fauquier, Spotsylvania, Stafford, Warren and Western Loudoun, and panhandle West Virginia, including the following areas, Berkeley, Jefferson and Morgan. * WHEN...Until midnight EDT tonight. * 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. * ADDITIONAL DETAILS... - Multiple rounds of heavy rainfall are possible through this evening, some of which may occur over areas which recently experienced flooding rains. Slow storm motions and repeat thunderstorm activity will occur within a tropical air mass. Hourly rainfall rates could push into the 2 to 3 inch range in the strongest storms, with an inch in 20 minutes possible. - 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.

...The combination of a slow moving frontal zone with a tropical air mass in place will increase the risk of flash flooding through this evening... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Washington DC, including the following areas in Maryland, including Anne Arundel, Calvert, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Frederick, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore, St. Marys and Washington, and Virginia, including the following areas, Albemarle, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Culpeper, Eastern Loudoun, Fairfax, Greene, King George, Madison, Northern Fauquier, Northwest Prince William, Orange, Rappahannock, Southern Fauquier, Spotsylvania, Stafford and Western Loudoun. * WHEN...Until 2 AM EDT Tuesday. * 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. * ADDITIONAL DETAILS... - Multiple rounds of heavy rainfall are possible through this evening into the early overnight hours, some of which may occur over areas which recently experienced flooding rains. Slow storm motions and repeat thunderstorm activity will occur within a tropical air mass. Hourly rainfall rates could push into the 2 to 3 inch range in the strongest storms, with an inch in 20 minutes possible. - 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.

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of central Maryland, including the following county, Montgomery. * WHEN...Until 145 AM EDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 1143 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 2 and 3 inches of rain have fallen. - Additional rainfall amounts up to 0.5 inches are possible in the warned area. - Some locations that will experience flooding include... Germantown... Rockville... Gaithersburg... North Potomac... Redland... Darnestown... Derwood... Washington Grove... - Please visit www.weather.gov/safety/flood for flood safety and preparedness information

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.

FFWLWX The National Weather Service in Sterling Virginia has issued a * Flash Flood Warning for... Central Montgomery County in central Maryland... * Until 145 AM EDT. * At 1038 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Germantown... Rockville... Gaithersburg... North Potomac... Redland... Darnestown... Derwood... Washington Grove...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Stay away or be swept away. River banks and culverts can become unstable and unsafe.