6:15 AM | **Transition to much cooler weather by week's end comes with heavy rain threat on Thursday/Thursday night**
Paul Dorian
6-Day forecast for the Washington, D.C. metro region
Today
Mainly sunny skies today, but there will be some late day clouds around, quite hot, humid, isolated showers and thunderstorms by day’s end, highs in the upper 90’s; S-SW winds around 5-10 mph
Tonight
Partly cloudy, mild, muggy, isolated showers and thunderstorms are likely, lows in the mid-to-upper 70’s
Thursday
Clouds and limited sun, not quite as hot, humid, good chance of showers and thunderstorms, some of the rain can be heavy at times, lower 90’s for afternoon highs
Thursday Night
Mainly cloudy, mild, muggy, good chance of showers and thunderstorms, some of the rain can be heavy at times, lower 70’s for late night lows
Friday
Mainly cloudy, noticeably cooler with well below-normal temperatures, quite breezy, lingering showers are possible during the morning hours, maybe a thunderstorm, mid-to-upper 70’s
Saturday
Mainly sunny, pleasant, near 80 degrees
Sunday
Mainly sunny, comfortable, lower 80’s
Monday
Mainly sunny, still comfortable, low-to-mid 80’s
Discussion
Today will be another very hot and humid day with plenty of sunshine during the morning hours and then increasing clouds later in the afternoon. The late day clouds will be in advance of a slow-moving cold frontal system which can result in isolated showers and thunderstorms through the evening hours. More numerous showers and thunderstorms are likely on Thursday in what will be a big-time transition day for the Mid-Atlantic region from the high heat and humidity of the first half of the week to much cooler conditions by week’s end.
As the cold front slowly grinds its way through the area, low pressure will form along the boundary zone and increase the chances for some heavy rainfall on Thursday and Thursday night and localized flash flooding is a possibility. Showers can linger on Friday - the first day of August - and the day will be much cooler with well below-normal temperatures and a stiff E-NE wind. Clearing skies should develop later Friday night and the first weekend of August should turn out to be one of the nicest of the entire summer season with very comfortable temperatures and low humidity values.
Meteorologist Paul Dorian
Arcfield Weather