Wednesday was the region’s hottest day of the year so far, reaching at least 95 degrees at Regan National Airport, Storm Team4 meteorologist Mike Stinneford said.
The severe thunderstorm watch issued for Wednesday night has been canceled, as storms and showers have diminished. Any lingering rainfall will end before midnight. It will be muggy overnight into Thursday morning.
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The National Weather Service has issued a flash flood watch from Thursday afternoon to Friday morning for D.C. and most of Maryland and Virginia.
Several rounds of thunderstorms are expected, with localized rainfall rates of up to one to two inches per hour possible. The National Weather Service predicts total rainfall amounts of one to three inches, with locally higher amounts of up to four inches possible.
Heavy rain in short periods of time could cause the potential for streams and creeks to quickly rise out of their banks, along with the potential for flash flooding in urban areas.
Temperatures will begin to drop as the rain pours, and on Friday, relief arrives with highs in the mid 70s to low 80s.
Storm Team4 meteorologist Chuck Bell said the biggest concern with storms is localized flooding, but that on Saturday and Sunday, there will be a decrease in rain and the sun will finally start to shine again.
Hot and humid today with scattered showers and thunderstorms this afternoon. Some thunderstorms will have the potential to be strong to severe and be capable of producing damaging winds. A Heat Advisory is in effect from noon to 8pm this evening near the Chesapeake Bay. pic.twitter.com/4ZuJvOYozN
— NWS Baltimore-Washington (@NWS_BaltWash) June 30, 2021
Tonight: Muggy with scattered showers and thunderstorms. Strong winds possible. Lows in the low to mid 70s.
Thursday: Showers and thunderstorms, with heavy rain and severe storms possible. Highs in the mid to upper 80s.
Friday: Showers and thunderstorms taper off, leading to a dry afternoon. Cooler and less humid. Highs in the low 80s.
Saturday: Partly cloudy with a chance of an afternoon or evening thunderstorm. Highs in the mid to upper 70s.
Sunday (Fourth of July): Partly to mostly sunny. Pleasant. Highs in the low to mid 80s.