Isolated storms may be severe with a damaging wind threat but the highest chance for severe weather is to the south and east of the metro region.
The wind damage pattern, radar images and wind reports support classifying last night's line of storms a derecho.
The thresholds for a severe thunderstorm are seemingly arbitrary, however, there is well-documented reasoning for each criterion.
With a big line of storms barreling out of the mountains, we decided to meet at the Lincoln Memorial for a storm chase. Ultimately, it turned into a rainbow chase -- a very successful one at that!
The most likely timing for storms is between 5 and 9 p.m. tonight. Heavy rain and frequent lightning are likely; damaging wind gusts are possible.
An expansive flash on June 25 in Falls Church covered nearly 150 square miles, and reached over 51,500 feet high. The flash extended and struck the ground near Silver Spring outside the parent storm.
A cold front and some moisture from tropical storm Arthur produced damaging storms in the D.C. metro area. The worst is over and July 4 weather looks terrific.
Heat provided the fuel for a nasty line of showers and thunderstorms that ripped through the city. Lightning connected with One World Trade Center.
Heat and humidity became an electrical combination in D.C. Wednesday night.
Today’s heat and humidity fuels a chance for severe t-storms. Tomorrow, tropical moisture from Arthur interacts with a cold front, setting up a possible flash flood scenario.