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Flooding rains inundate parts of area...

Jason Samenow @ 11:11 PM

An impressive band of torrential rain set up between McLean, VA and Laurel, MD causing numerous incidents of flooding yesterday evening. National Weather Service spotters and emergency officials reported flash flooding in Chevy Chase, College Park and Colesville, Md. The Washington Post reports numerous rescues were necessary due to flooding of creeks and roadways in DC and Maryland.

Here are some of yesterday's rain totals from the AWS WeatherNet:
Laurel, MD: 4.5"
Burtonsville, MD: 4.1"
Silver Spring, MD: 3.8"
Takoma Park and Beltsville, MD: 3.6"
McLean, VA: 3.2"
NW Washington, DC: 2.8"

Doppler estimated rainfallThe image on the left shows doppler estimated rainfall totals which nicely illustrates the band of heavy rainfall in the corridor described. Areas in yellow indicate rainfall in excess of 2.5". Areas in orange and red received over 4" and 5" respectively. Note some of the heavy rain that fell over the bay and around St. Mary's County where flooding was also reported. Interestingly, the rainfall totals cutoff sharply in western Fairfax and Montgomery counties. This is not unusual given the nature of summertime thunderstorms. Some areas get pounded, other areas hardly see a drop of rain.

Scattered rain showers, some heavy, remain possible today. Temperatures will warm into the mid 80s. Thursday looks to be a warm, dry day with temperatures approaching seasonal norms, near 90. The humidity looks to creep up for Friday and the weekend, with isolated storms possible. More on that to come...

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