Severe Storms Likely This Afternoon & Evening

High-Resolution North American Model, courtesy Pivotal Weather (time stamp upper right corner)

The combination of heat and oppressive humidity will aid in the development of scattered to numerous thunderstorms this afternoon and evening. A trough will be sliding through the area as well adding a focal point for lift in the atmosphere.

Storms today could contain frequent lightning, hail and damaging winds in excess of 60 mph. A Severe Thunderstorm Watch May be issued later this afternoon.

Flash flooding will also be a concern today given the very moist atmosphere with dew points in the lower 70s (oppressive humidity).

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.