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.

Final Day of Heatwave in DMV, Scattered Storms Possible Late this Afternoon

Highs today will climb into the mid to upper 90s with real feel temperatures in the lower 100s. Widely scattered thunderstorms may develop across the DC Region late this afternoon into the evening hours.

The image above (courtesy Pivotal Weather) shows the future cast radar from the North American Model with a time stamp in the upper left hand corner showing where scattered thunderstorms may develop late this afternoon and evening.

DC Area Under Slight Risk for Severe Storms on Wednesday

Storms will fire again this afternoon with about 50% coverage, meaning about half of us will remain dry and half of us will get relief from the heat. Yesterday’s storms put down some pretty good rainfall totals across Annandale, Burke, Springfield, Newington and Alexandria in Fairfax County with some locations picking up over an inch of rain there.

The image below is from the latest high-resolution North American Model showing where storms may fire this afternoon.

If you didn’t get wet yesterday afternoon and miss out on the storms today in your back yard, storms are forecast to be more widespread on Wednesday afternoon.

The Storm Prediction Center (SPC) has placed the Mid-Atlantic (image below, courtesy NOAA) under a “slight risk” for severe storms on Wednesday afternoon and evening with the primary threat being damaging winds.

Stay cool out there!