From the ABC 7 Weather team

D.C. Forecast: Hot & Humid today, cloudy with storms on Monday

September 1, 2013 - 11:42 AM
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Look for a mostly sunny, very warm, and quite humid day with just a slight chance of an afternoon thunderstorm.  Highs should be near 90.  Showers & thunderstorms are more likely on Labor Day.

This Afternoon:
Mostly Sunny, Hot, Humid, Slight Rain Chance
Highs: 87-92
Wind: SW 5-10 mph
Mostly Cloudy, Warm, Humid
Lows: 65-74
Wind: SW 5 mph
Mostly Cloudy, Hot, T'Storms Likely
Highs: 86-91
Rain: 60% Chance

Like yesterday, this middle day of the holiday weekend is warm and muggy.  And while it is the first day of meteorological fall, summer's signature is still on the forecast!  With a high pressure center remaining off the coast and continuing to pump warm, moist air from the south, today will again see the mercury flirt with 90 degrees - it hit 92 at Reagan National on Saturday.  Dew point values will stay near the sticky 70s today, but there is just a slight chance of thunderstorms.  

Labor Day looks far less benign.  Mostly cloudy skies and very warm temperatures are likely through the midday as a cold front approaches the area.  The late afternoon is then  likely to feature some strong storms with heavy downpours and the possibility of hail.  Before the storms, highs could again be around 90.  The passage of the front, which could be rather slow, will gradually dry out the atmosphere and yield a rather pleasant Tuesday.  Temperatures will drop to near seasonal norms - a high of 84 - with the remainder of the week noticeably cooler and drier.  Daytime highs around 80 and night time lows near 60 will convince us that summer is slowly loosening her grip!  Enjoy your Sunday. 

NOTE: With Summer '13 now history, some significant facts include June being the wettest summer month (9.97 inches, a full 6.19" above the norm); July was the hottest with an average temperature of 81 degrees and featuring a full 11 days at or above 90 degrees; and August came in as the driest of the summer months with a mere 1.34 inches (off the norm by 1.59").  The summer was the 25th warmest on record, but significantly cooler than the last three - which were the 3 hottest ever!

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