Severe Storms in the Upper Midwest; Heavy Rain in the Mid-Atlantic; Widespread Heat in the Southwest

Severe storms with damaging winds, large hail, and locally heavy rain will impact portions of the Upper Midwest. A lingering front will bring another round of heavy showers and thunderstorms to the Mid-Atlantic. Excessive heat continues in the South Plains to the Southwest, and fire weather threats remain Critical across the Great Basin, Northern Rockies, and into the Plains.
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Last Update: 1157 AM EDT Thu Aug 13 2020

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Philadelphia, PA Local Forecast Office

31NM SSE New York NY

Marine Zone Forecast


Synopsis: A frontal boundary will slowly sag southward through Saturday as high pressure builds across eastern Canada. Several waves of low pressure will move along this boundary, keeping unsettled weather across the area. An area of low pressure is forecast to lift northward across the area Sunday into Monday. A cold front may stall to our south and offshore for much of next week.

Rest Of Today
NW winds around 5 kt, becoming SE around 5 kt this afternoon. Seas 2 ft or less. A chance of showers with a slight chance of tstms late this morning, then scattered tstms this afternoon. A chance of showers late. Vsby 1 to 3 nm this afternoon. Swell mainly from the SE with a dominant period of 9 seconds.
Tonight
E winds around 5 kt. Seas 2 ft or less. A chance of tstms early in the evening with vsby 1 to 3 nm. Swell mainly from the SE with a dominant period of 9 seconds.
Fri
E winds 5 to 10 kt with gusts up to 20 kt, increasing to 10 to 15 kt with gusts up to 20 kt late. Seas 2 ft or less. A chance of tstms. Swell mainly from the S with a dominant period of 9 seconds.
Fri Night
NE winds 10 to 15 kt. Gusts up to 20 kt. Seas around 3 ft. A chance of tstms early in the evening. Swell mainly from the SE with a dominant period of 7 seconds.
Sat
NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Sat Night
E winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of tstms after midnight.
Sun
E winds 15 to 20 kt. Seas 4 to 6 ft. A chance of tstms.
Sun Night
E winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. A chance of tstms.
Mon
NE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of tstms.
Mon Night
NW winds 5 to 10 kt. Seas around 3 ft. A chance of tstms in the evening. winds and seas higher in and near tstms.

Winds and seas higher in and near tstms.
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ABOUT THIS FORECAST

Last Update: 1157 AM EDT Thu Aug 13 2020
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