7:00 AM | **Potent system crosses the Great Lakes today and contributes to shower/thunderstorm activity here later tonight into early Friday**
Paul Dorian
6-Day forecast for the Washington, D.C. metro region
Today
Partly sunny, quite warm, humid, isolated late day showers and thunderstorms, highs in the upper 80’s; Light and variable winds
Tonight
Mainly cloudy with an increasing chance of showers and thunderstorms, some of the late night storms can be strong and some of the late night rain can be heavy, mild, muggy, lows near 70 degrees
Friday
Mainly cloudy in the morning with the chance of showers and thunderstorms, some of the morning storms can be strong and some of the morning rain can be heavy, partly sunny in the afternoon with an isolated shower or thunderstorm possible, quite warm, humid, upper 80’s for afternoon highs
Friday Night
Becoming partly cloudy, mild, upper 60’s for late night lows
Saturday
Mostly sunny, warm, mid-to-upper 80’s
Sunday
Mainly sunny, quite warm, upper 80’s
Monday
Mainly sunny, warm, more humid, chance of showers and thunderstorms, mid-to-upper 80’s
Tuesday
Mainly sunny, quite warm, humid, chance of showers and thunderstorms, upper 80’s
Discussion
A potent system will cross the Great Lakes later today at the same time a front to our south begins to advance northward as a warm front. The combination of these systems - along with loads of available low-level moisture - will result in an increasing unstable atmosphere from later tonight into early Friday. While there can be an isolated shower or thunderstorm late today, the main action time period, I believe, will be from about midnight-to-noon when showers and thunderstorms are likely to become more numerous. Any late night and early Friday storm can be strong and downpours are on the table…watch out for the possibility of flash flooding. High pressure will then begin to build into the region by Friday night and there is reasonable hope that the weekend actually features back-to-back rain-free days in the Mid-Atlantic region along with comfortably warm temperatures.
Meteorologist Paul Dorian
Arcfield Weather