Excessive Heat Warning Likely on Thursday

Record Heat at Dulles Airport Today

Dulles Airport set a record high today of 99 degrees breaking the old record of 97 degrees set in 2010.

Thursday Hottest Day of Summer Thus Far

The Heat Index forecast below shows the real-feel temperatures nearing 110 across the interstate 95 corridor, flirting with the criteria for an Excessive Heat Warning.

Thunderstorms will be more widely scattered tomorrow afternoon as a ridge of high pressure off of the Atlantic coast builds into our region.  Still a few storms that do form during the peak heating of the afternoon and evening could easily reach severe limits with damaging winds being the primary threat.

Deja Vu Wednesday with More Severe Thunderstorms Possible

Heat Advisory Wednesday | Excessive Heat Watch Thursday

The Heat Index on Wednesday will be running between 105 and 110 degrees. Stay hydrated and know the signs of heat exhaustion and heat stroke if you must be outdoors during the afternoon.

Deja Vu with More Strong to Severe Thunderstorms Wednesday PM

Most of the high-resolution models show another line of scattered strong to severe storms moving through the Washington DC Metropolitan Area between 4 and 6pm.

Main Threats will be Damaging Winds in excess of 60 to 70mph and small hail. Dangerous heat returns Thursday and Friday with our area under an Excessive Heat Watch.  Excessive Heat Warnings are issued when heat indexes (real feel temperatures) are expected to surpass 110 degrees.

Severe Storms Possible Today and Especially on Thursday, Much Cooler Weather for the Weekend!

The Storm Prediction Center (SPC) has placed much of the Washington Region under a Marginal Risk for Severe Thunderstorms this afternoon. 

Latest High-Resolution Guidance

Storm coverage this afternoon and evening looks to be around 30 to 50%, meaning most of us should remain dry (if these models are accurate).  Any storms that do fire late this afternoon and evening will be capable of producing damaging winds in excess of 60mph and hail. Time stamp is in the upper left hand corner of image below (courtesy PivotalWx).

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