From the ABC 7 Weather team

Washington D.C. Forecast: Flooding and Severe Weather Concerns

April 29, 2014 - 11:21 PM
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Areas of flooding will be possible tonight through early Thursday morning. Severe storms may be possible Wednesday afternoon.

Tonight:
Areas of Rain, Heavier After Midnight
Temperatures: 50s
Wind: E 10-20 m.p.h.
Wednesday:
Rain and Thunderstorms, Possibly Severe
Highs: Near 70
Rain: 1-3" Possible
Thursday:
Becoming Partly Sunny, AM Shower Possible, Warmer
Highs: Near 80
Precipitation: 30% AM

FLASH FLOOD WATCH from 10 pm tonight until 6 am Wednesday

 

FLOOD WATCH from 8 pm Wednesday until 2 pm Thursday

Periods of rain and drizzle accompanied by very cool air will continue this evening. The major players on the weather map are a large, independent area of low pressure over the Midwest. The center of circulation of this system is over northern Missouri. A warm from is spreading eastward from the low and a cold front is forming to the east of the circulation center and extends well southward towards Louisiana. The warm front will slowly move northward towards our area as another area of low pressure develops along the cold front over the deep south.

This complex pattern supports our forecast of excessive rainfall, scattered thunderstorms and a slight chance of isolated tornadoes during the day tomorrow into tomorrow evening. Total cumulative rainfall estimates continue in the range of 3 to 5 inches. The best chance for isolated severe weather is south and east of Washington but that threat may lift closer to the metropolitan area should the warm front move farther to the north.

The bottom line here: excessive rain and flooding will become likely in many areas and there is a slight risk of severe weather as elements of heavy rain and thunderstorms may “train” during the day tomorrow. That means the storm track will remain fairly stationary. Individual locations may see one storm after the other, after the other. These spots…once identified… will become prime locations for flooding.

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