Multiday Heat Wave Forecast For Much of Central/Eastern U.S.

A major summer heat wave is forecast midweek into this coming weekend across much of the central and eastern states and lingering in the southwest. The combination of temperature and humidity will lift the heat index above 100 in many locations with 110 or higher possible in the warmest locations. There will be nearly no relief at night with overnight low temperatures in the upper 70s and 80s.
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Last Update: 644 PM EDT Tue Jul 16 2019

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Philadelphia, PA Local Forecast Office

20NM SSW Atlantic City NJ

Marine Zone Forecast


Synopsis: A warm front will lift across the region this evening and overnight. The remnants of tropical system Barry will cross the area later Wednesday and through Thursday. Bermuda high pressure will establish itself over our area Friday and remain through the weekend. A cold front will drop down from the Great Lakes early next week.

Tonight
SW winds 10 to 15 kt. Gusts up to 20 kt late this evening. Seas 2 ft or less. Swell mainly from the SE with a dominant period of 10 seconds. a slight chance of showers and tstms late this evening. A slight chance of showers after midnight.
Wed
SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 15 to 20 kt late. Seas 2 ft or less, then around 3 ft early in the afternoon. Swell mainly from the SE with a dominant period of 10 seconds.
Wed Night
SW winds 15 to 20 kt, diminishing to 5 to 10 kt. Seas 3 to 4 ft. Swell mainly from the SE with a dominant period of 10 seconds. a chance of showers and tstms. Patchy fog after midnight with vsby 1 to 3 nm.
Thu
SW winds 5 to 10 kt. Seas 3 to 4 ft. Swell mainly from the S with a dominant period of 9 seconds. patchy fog early in the morning. A chance of tstms. A chance of showers. Vsby 1 to 3 nm.
Thu Night
SW winds 5 to 10 kt, becoming W after midnight. Seas around 3 ft. A chance of showers and tstms. Vsby 1 to 3 nm in the evening.
Fri
W winds around 5 kt, becoming SW in the afternoon. Seas 3 to 4 ft.
Fri Night
SW winds around 10 kt. Seas around 3 ft.
Sat
SW winds 5 to 10 kt. Seas around 3 ft.
Sat Night
W winds 5 to 10 kt. Seas around 3 ft.
Sun
W winds 5 to 10 kt, becoming SW in the afternoon. Seas around 3 ft.
Sun Night
SW winds around 5 kt. Seas around 3 ft. 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: 644 PM EDT Tue Jul 16 2019
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