Heavy Rainfall and Flash Flood Threat for the Southern Plains Today; Severe Thunderstorms from the Northeast to the Ohio Valley

Heavy rains are leading to an elevated concern for flash flooding across parts of Oklahoma and Texas today, and this heavy rainfall will spread slowly east over the weekend. Severe thunderstorms may produce damaging winds and a few tornadoes across parts of the Northeast and Ohio Valley this afternoon and evening. Significant river flooding continues across the Carolinas.
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Last Update: 628 PM EDT Fri Sep 21 2018

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Philadelphia, PA Local Forecast Office

19NM NNE Lewes DE

Marine Zone Forecast


Synopsis: A cold front moves across the east coast tonight into early Saturday morning. This front will stall to our south as high pressure builds out of the Great Lakes region and into the northeast Saturday. This high will combine with another high across eastern Canada Sunday, and will build across New England and the Canadian Maritimes Monday, then offshore into Tuesday. The front to our south is forecast to lift across the area as a warm front Tuesday into Tuesday night, followed by a cold front later Wednesday. High pressure may briefly build across the northeast, before another frontal system affects the east coast by the end of next week.

Tonight
SW winds 10 to 15 kt. Gusts up to 20 kt. Waves 2 to 3 ft.
Sat
W winds 10 to 15 kt with gusts up to 20 kt, becoming N in the afternoon. Waves around 3 ft in the morning, then 2 ft or less.
Sat Night
NE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers after midnight.
Sun
NE winds 10 to 15 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 2 ft or less. A chance of showers.
Sun Night
NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Waves 2 ft or less, then around 3 ft after midnight. A chance of showers.
Mon
E winds 15 to 20 kt with gusts up to 30 kt. Waves 3 to 4 ft. A chance of showers.
Mon Night
E winds 15 to 20 kt with gusts up to 30 kt. Waves 3 to 5 ft. A chance of showers in the evening, then showers likely after midnight.
Tue
SE winds 15 to 20 kt. Waves 3 to 4 ft. Showers likely.
Tue Night
S winds 10 to 15 kt. Waves around 3 ft. Showers likely, mainly in the evening.
Wed
S winds around 10 kt. Waves 2 ft or less. A chance of showers. A chance of tstms in the afternoon.
Wed Night
W winds 5 to 10 kt, becoming NW after midnight. Waves 2 ft or less. A chance of tstms in the evening. A chance of showers. winds and waves higher in and near tstms.

Winds and waves higher in and near tstms.
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Last Update: 628 PM EDT Fri Sep 21 2018
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