Severe thunderstorms possible from the central Plains to the upper Midwest

Severe thunderstorms containing damaging winds, large hail, heavy rainfall, and a few isolated tornadoes will be possible this afternoon into tonight from the central Plains to the upper Midwest. The threat is expected to shift east into the Great Lakes region by Friday. In addition, heavy rainfall could cause localized flooding concerns.
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Last Update: 602 AM EDT Wed Jun 28 2017

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Philadelphia, PA Local Forecast Office

26NM S New York NY

Marine Zone Forecast


Synopsis: High pressure over our region today will shift offshore this evening, then remain there through Friday. A weak cold front is forecast to arrive later Sunday, however this boundary may then stall across our region early next week.

Today
NW winds 10 to 15 kt, becoming W 5 to 10 kt late this morning, then becoming SW early this afternoon, becoming S 15 to 20 kt late. Waves 2 ft or less. Mainly in SE swell with a dominant period of 9 seconds.
Tonight
SW winds 15 to 20 kt, diminishing to 5 to 10 kt. Waves 2 ft or less. Mainly in SE swell with a dominant period of 9 seconds.
Thu
SW winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Waves 2 ft or less, then 3 to 5 ft in the late morning and afternoon. Mainly in S swell with a dominant period of 7 seconds.
Thu Night
SW winds 20 to 25 kt, diminishing to 15 to 20 kt late. Seas 3 to 5 ft. Mainly in S swell with a dominant period of 5 seconds.
Fri
SW winds 15 to 20 kt. Seas 3 to 5 ft.
Fri Night
SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft.
Sat
S winds 10 to 15 kt. Seas 3 to 4 ft.
Sat Night
S winds 10 to 15 kt. Seas around 3 ft. A chance of showers and tstms.
Sun
SW winds around 10 kt. Seas around 3 ft. A chance of showers and tstms.
Sun Night
W winds 5 to 10 kt. Seas around 3 ft. A chance of showers and 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: 602 AM EDT Wed Jun 28 2017
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