Sunday, July 31, 2016

More Flooding Rain Possible for the Northeast into Monday

Brian Donegan
Published: July 31,2016

The risk for heavy rain and flooding will continue in the Northeast into Monday from a combination of a frontal system and an upper-level disturbance over the region.
Slow-moving storms caused major flooding in Ellicott City, Maryland, Saturday night. Cars were swept away and numerous water rescues were reported.
(MORE: Major Flooding in Ellicott City)
Water rescues were reported in Wayne, New Jersey, Sunday night as slow-moving thunderstorms continuously dumped heavy rain over northeastern New Jersey and into New York City.
The National Weather Service has issued a flash flood watch for parts of central and northern New Jersey and eastern Pennsylvania through Monday evening.

Current Radar with Watches and Warnings
(MORE: View National Interactive Radar Map | Difference Between a Watch and a Warning)

Heavy Rain Threat Continues

Into Monday, the heavy rain threat will stretch from Delaware and northern Maryland, up through Pennsylvania, New Jersey, New York and into New England.
Some spots could see as much as five inches, while most will see 1-3 inches of rain.
(MORE: Three Drought Areas You May Not Have Heard About)

Rainfall Forecast

Setup for Flash Flooding

An upper-level trough of low pressure continues to nudge eastward toward the East Coast and a tropical air mass will remain in place.
Meanwhile, a stalled front is already in place over the Northeast, and the interaction of these two features will set the stage for potentially heavy rainfall.
Low pressure will move eastward into the southern Northeast. This low will bring warm, moist air northward behind a warm front that will reach southern New York by Monday.
As the low continues moving east, the threat for flash flooding extends northward into parts of southern New England.
MORE: West Virginia Flooding in June

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