Thursday 10 a.m.
While many places from Pennsylvania to Massachusetts had dry weather this morning, showers and thunderstorms have been drenching, and in some cases flooding, the area from central and eastern Virginia into southern Maryland and southern Delaware. This is a picture from the Dover, Del., radar at 10 a.m. EDT:
This video show how things should progress during the next several days.
Tomorrow will be a warm, humid midsummer-style day for the Middle Atlantic and southern New England states. However, a strong cold front will advance through the Great Lakes late tomorrow through Saturday then move off the East Coast Sunday. Cooler, drier air will follow the front. However, downwind from the Great Lakes, the action of cool air passing over warm water will cause lake-effect clouds and perhaps showers.
A cool high pressure area should be in charge of Northeast weather Monday and Tuesday, then southwest winds will roll back the coolness, and it should be warmer Wednesday and Thursday.
Tropical storm season is quite busy right now. Hurricane Michael blew up into a Category 3 storm over the central Atlantic, Leslie churns slowly toward the general area of Bermuda and the piece of Isaac that meandered south to the Gulf is in a place where storms can strengthen.
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