Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas.
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Last Update: 1213 PM EDT Thu Sep 20 2018

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Philadelphia, PA Local Forecast Office

35NM NNW Lewes DE

Marine Zone Forecast


Synopsis: High pressure will continue building in from the north through Thursday before pushing off the New England coast through early Friday. A cold front will approach from the north and west on Friday before passing through the area Friday night and Saturday morning. The front will then stall just south of our area through the end of the weekend as high pressure builds to our north. The high begins pushing offshore through the beginning of next week.

This Afternoon
E winds 5 to 10 kt. Waves 2 ft or less.
Tonight
SE winds 5 to 10 kt. Waves 2 ft or less.
Fri
SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt late. Waves 2 ft or less.
Fri Night
SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft after midnight, then 2 ft or less late.
Sat
W winds 5 to 10 kt, becoming N in the afternoon. Waves 2 ft or less.
Sat Night
NE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Sun
NE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Sun Night
NE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers.
Mon
E winds 10 to 15 kt. Waves 2 ft or less, then around 3 ft in the afternoon. A chance of showers.
Mon Night
E winds 10 to 15 kt. Waves around 3 ft. A chance of showers.
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ABOUT THIS FORECAST

Last Update: 1213 PM EDT Thu Sep 20 2018
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