Severe Thunderstorms Possible From The Plains To The Great Lakes, Heat Wave To Continue Over The Southern U.S.

Scattered strong to severe thunderstorms capable of damaging winds, large hail, isolated tornadoes, and heavy rainfall will be possible through tonight from the central Plains to the Great Lakes and Northeast U.S. The heavy rainfall could lead to localized flash flooding. Excessive heat will persist across the southern Plains and Desert Southwest early this week.
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Last Update: 1132 AM EDT Sun Aug 18 2019

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Philadelphia, PA Local Forecast Office

15NM E Lewes DE

Marine Zone Forecast


Synopsis: Southerly winds will keep hot and humid conditions in our region through mid week. A weak cold front will arrive Monday night before stalling and dissipating. A stronger cold front will move through the region Wednesday night into Thursday. In its wake, cooler high pressure will build in for the end of the week.

This Afternoon
S winds 5 to 10 kt. Seas 2 ft or less, then around 3 ft late. Swell mainly from the SE with a dominant period of 8 seconds.
Tonight
SE winds 5 to 10 kt, becoming N late. Seas around 3 ft early in the evening, then 2 ft or less, then around 3 ft late. Swell mainly from the SE with a dominant period of 8 seconds. patchy fog after midnight with vsby 1 to 3 nm.
Mon
NW winds around 5 kt, becoming S in the afternoon. Seas around 3 ft early in the morning, then 2 ft or less. Swell mainly from the SE with a dominant period of 7 seconds. patchy fog early in the morning with vsby 1 to 3 nm.
Mon Night
SW winds 10 to 15 kt, diminishing to 5 to 10 kt late. Seas 2 ft or less. Swell mainly from the SE with a dominant period of 8 seconds.
Tue
S winds 5 to 10 kt. Seas 2 ft or less, then around 3 ft in the afternoon.
Tue Night
SW winds 5 to 10 kt. Seas around 3 ft. A chance of tstms. A chance of showers. Vsby 1 to 3 nm.
Wed
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft in the morning, then 2 ft or less. A chance of showers and tstms in the afternoon.
Wed Night
SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas around 3 ft. A chance of showers and tstms.
Thu
W winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Thu Night
NW winds 10 to 15 kt, becoming N after midnight. Gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms. 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: 1132 AM EDT Sun Aug 18 2019
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