AccuWeather meteorologists say that after a dry weekend, a surge of moist air combined with other factors will lead to multiple rounds of showers and thunderstorms in the Northeastern United States this week.
Heavy downpours and storms could hamper some outdoor plans and cause localized urban flooding and flash flooding. Rain may also ease drought conditions in some areas.
Breezy winds from the Gulf of Mexico and Atlantic Ocean, along with several dips in the jet stream, will make the Northeast a little wetter over the weekend. The same jet stream setup will result in multiple rounds of severe weather, mostly in the central states.
While coastal storms on Monday brought 1-3 inches of rain to parts of New England and less than 0.10 inches to New York City, much of the East was in warm and humid territory to start the week , which will last until Tuesday.
However, showers and thunderstorms that have intensified in the Midwest since last week and persisted in parts of the Southeast will begin to converge in the Northeast Tuesday into Wednesday.
Heavy downpours could continue into Wednesday night, causing flash flooding in parts of the Ohio and Tennessee valleys and the southern Appalachians.
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Rainfall amounts of 1-4 inches are possible, with locally higher amounts possible. The risk of flash flooding will be greatest if 1-2 inches of rain falls within a few hours.
As this pattern moves into midweek, parts of the central Appalachians and New England could experience rainfall amounts similar to those seen in the Tennessee and Ohio Valleys.
With no major area of high pressure from Canada moving in after midweek, the air will remain moist enough to support pop-up showers and thunderstorms through at least Thursday afternoon.
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Over the weekend, humid air lingers, with more showers and thundershowers.
It may take until Sunday for enough dry air to mix in from the Great Lakes to end or reduce the threat of showers in the Ohio and Tennessee valleys and much of the Northeast.
A tropical feature currently approaching a small island in the eastern Caribbean will be closely watched next week to see if it may strengthen and increasingly impact the southeastern United States.
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