Multiple rounds of heavy rain and thunderstorms are expected on Monday, July 6, into Monday night, with flash flooding possible across parts of the Northeast, according to the National Weather Service.
The heaviest rain could fall quickly enough to overwhelm roads, low-lying areas, and poor-drainage spots.
Rainfall rates may reach 2 to 3 inches per hour in the hardest-hit areas. Widespread totals of 3 to 6 inches are possible, with isolated amounts topping 8 inches along parts of the I-95 corridor.
Flood watches are in effect across portions of the region.
The greatest concern is in New York, New Jersey, and Connecticut, where repeated downpours could cause flash flooding in urban and low-lying areas, including the New York City metro area.
Eastern Pennsylvania and western Massachusetts could also see steady, heavy rain, raising the risk for stream flooding and urban runoff.
Farther south, parts of Maryland, Virginia, and eastern Pennsylvania could see heavy rain and isolated stronger thunderstorms.
AccuWeather’s Sunday-to-Tuesday rainfall map shows a broad swath of 1 to 4 inches from the Midwest into the Northeast, with a zone of 4 to 8 inches near parts of the New York City metro area, the Hudson Valley, Connecticut, and southern New England.
The map also shows an AccuWeather Local StormMax of 9 inches.
AccuWeather says thunderstorms may repeatedly move over the same areas, increasing the risk of flash flooding. Storms could also produce torrential rainfall, lightning, and travel delays.
Drivers should never try to cross flooded roads. The National Weather Service says it only takes 6 inches of fast-moving water to sweep someone off their feet.
Showers may continue Tuesday, July 7, and could still be heavy at times before gradually tapering during the evening.
Conditions should improve Wednesday, July 8, with a mix of sun and clouds and a drier pattern taking hold.
Thursday, July 9, looks mostly sunny and dry, with highs in the low-to-mid 80s.
By Friday, July 10, mostly sunny skies are expected, though a slight chance of afternoon thunderstorms may return.
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