From the ABC 7 Weather team

D.C. Heat & Humidity Comeback: Severe Storms, Too?

July 26, 2012 - 05:00 AM
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High heat and humidity will make a comeback to end the work week.  Find out where storms are most likely.


Sunny, Seasonable, and Reasonable (I have to quote Bob Ryan on that clever rhyme).  Those three words pretty much sum up D.C.'s Wednesday forecast.  Not only a brilliant blue sky, with a few high, thin cirrus clouds, but highs about average, with extremely low humidity.  Well, I hope you were able to enjoy it, since the late July heat and humidity will return with a vengeance to round out the work week.  It was nice while it lasted, right?  Here's a clear view of the city from atop the WJLA/NC8 building late Wednesday afternoon.  Notice how clear it is!  Usually we look at a pretty hazy view of the city.

Washington WeatherBug Camera - June 24, 2012

High temperatures Thursday will climb well into the 90s with a few triple digit readings possible, too. 

Forecast Highs Thursday, June 25, 2012

Now we all remember some of the days, this summer, when highs were in the upper 90s and low 100s and  we got rocked with severe storms.  I'm sure most people still vividly remember the infamous D.C. Derecho.  So, is there any possibility of another Derecho, or at least the threat for severe storms, with this next bout of intense heat and humidity? 

Yes.  Do I think we're in for another Derecho in D.C. tomorrow?  No.  Now I will say that isn't out of the realm of possibility for points North and West of D.C. - especially in Pennsylvania and Ohio.  Take a look at the Storm Prediction Center's Convective Outlook for Thursday, July 26.

Storm Prediction Center: Convective Outlook

The greatest risk for severe storms and damaging winds will be North and West of the WJLA/NC8 viewing area.  Extreme Western Maryland and points West of the Blue Ridge will be the most likely to see storms develop.  The storms will develop ahead of a front that will move out of the Upper Midwest and into the Mid Atlantic and Northeast Thursday and will eventually slide offshore by late Friday.  That means there will be enough lift and energy to support storm development over the next two days.  Here's one simulation of the atmosphere on Thursday.


We DO NOT anticipate another D.C. derecho this week, but it may not be out of the question for people in Pennsylvania and New York.  The StormWatch7 weather team will monitor storm development and will keep you informed.  On twitter?  Want to receive ONLY severe weather alerts?  Follow StormWatch7.  Now is also a good time to see if you're prepared when severe weather strikes.  Here's a great list of items you should have on hand in the event of severe weather and other emergencies. 

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