Flash Flood Watches in Southeast and Tennessee Valley; Critical Fire Weather in California; Severe Weather in Upper Midwest

Flash flood watches are in effect today in parts of the Southeast and Tennessee Valley from organized areas of heavy to excessive rainfall. Meanwhile, critical fire weather conditions are likely across northern California with offshore winds and dry conditions. Finally, a strong cold front will produce severe thunderstorms across the Upper to Mid Mississippi Valley.
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Last Update: 1004 AM EDT Mon Sep 20 2021

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Philadelphia, PA Local Forecast Office

20NM SSW Atlantic City NJ

Marine Zone Forecast


Synopsis: High pressure will build off shore tonight then remain near the Canadian Maritimes through Tuesday. A cold front is expected to cross the region Thursday into Friday. High pressure may build in to start the weekend.

Rest Of Today
E winds around 15 kt. Seas 3 to 4 ft. Swell mainly from the E with a dominant period of 8 seconds.
Tonight
E winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog late with vsby 1 to 3 nm. Swell mainly from the E with a dominant period of 7 seconds.
Tue
E winds around 10 kt. Seas 3 to 4 ft. Patchy fog in the morning with vsby 1 to 3 nm. Swell mainly from the E with a dominant period of 8 seconds.
Tue Night
SE winds around 10 kt. Seas 3 to 4 ft. Patchy fog after midnight with vsby 1 to 3 nm. Swell mainly from the E with a dominant period of 9 seconds.
Wed
SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 to 3 nm in the morning.
Wed Night
SE winds around 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. A chance of showers.
Thu
S winds around 15 kt. Seas 4 to 6 ft. A chance of showers.
Thu Night
S winds 10 to 15 kt. Seas 4 to 5 ft. A chance of tstms. Showers likely. Vsby 1 to 3 nm.
Fri
W winds 5 to 10 kt. Seas 3 to 5 ft. Showers likely, mainly in the morning.
Fri Night
W winds 5 to 10 kt. Seas 3 to 4 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: 1004 AM EDT Mon Sep 20 2021
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