From the ABC 7 Weather team

Warm and humid with showers today, cool and dry by week's end

September 11, 2011 - 11:53 AM
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After a rare day of no rain, the month reverts to type with a threat of thunderstorms today. Flash flooding could easily occur. So do be careful 

This Afternoon: Pt. Sunny, Humid, PM Storms Possible

Highs: 80-85 | Precipitation: 50%

Tonight: Mostly Cloudy & Humid, Iso. T'storms

Lows: 60-68 | Wind: SE 5 mph

Monday: Mostly Sunny & Warm, Shower Poss.

Highs: 82-87 | Wind: W 5-10

We made it through the entire day yesterday with nary a drop of rain - only the second such dry day this month - but its not likely our luck will hold for the entire weekend.  With a low pressure system drifting back in our direction and plenty of moist, unstable air, there is a good chance of showers and thunderstorms late this afternoon and early evening.  Any storms that develop could contain high winds, hail, and heavy rain.  As a consequence, the Weather Service has issued a Flash Flood Watch for most of the metro area from noon through this evening.  With water-logged ground from our recent deluge, it won't take much rain for flooding to occur.   

The threat of showers will diminish tomorrow, but the warm, humid air will persist until midweek.  A cold front on Wednesday however, is expected to bring some dramatic changes for week's end.  Look for much cooler and drier air to arrive by Thursday: daytime highs just near 70 and dew points in the 40s will signal that autumn is nigh!

NOTE: Reagan National, the official weather station for Washington, has tallied a whopping 16.01 inches of rain since August 1st, raising the yearly total to 34.39 inches, a full 6.88" above normal.  That figure is close to the entire year's total in 2010 when 34.78" fell.  Reagan's yearly average is 39.74", meaning that we're just 5 inches below that total - with over 3.5 months to go!  Enjoy what is a solemn Sunday in the Nation's Capital. 

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