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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Hazardous Weather Conditions

Last Update: 1003 AM EDT Mon Sep 20 2021

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Miami - South Florida Local Forecast Office

10NM E Virginia Key FL

Marine Zone Forecast


Synopsis: South Florida remains on the periphery of weak surface high pressure. Scattered showers and thunderstorms will be possible from time to time over all local waters over the coming days. Winds and waves could be locally higher in and around any shower or thunderstorm.

.GULF STREAM HAZARDS...None.

The approximate location of the west wall of the Gulf Stream as of Sep 18, 2021 at 1200 UTC...

9 nautical miles southeast of Fowey Rocks. 13 nautical miles southeast of Port Everglades. 12 nautical miles east of Lake Worth. 14 nautical miles east of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Today
East southeast winds 5 to 10 knots. Seas around 2 feet. Period 3 seconds. Intracoastal waters a light chop. Chance of showers and thunderstorms.
Tonight
East winds around 10 knots. Seas around 2 feet. Period 3 seconds. Intracoastal waters a light chop. Chance of showers and thunderstorms.
Tuesday
East winds around 10 knots. Seas around 2 feet. Period 3 seconds increasing to 8 seconds. Intracoastal waters a light chop. Chance of showers and thunderstorms.
Tuesday Night
East winds 5 to 10 knots. Seas around 2 feet. Period 3 seconds. Intracoastal waters a light chop. Chance of showers and thunderstorms.
Wednesday
East winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. Chance of showers in the morning. Chance of thunderstorms. Showers likely.
Wednesday Night
East southeast winds around 5 knots becoming south in the morning. Seas around 2 feet. Intracoastal waters smooth. Chance of showers and thunderstorms.
Thursday
South southeast winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. Chance of showers in the morning. Chance of thunderstorms. Showers likely.
Thursday Night
South winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. Chance of showers and thunderstorms.
Friday
South southeast winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. Chance of showers in the morning. Chance of thunderstorms. Showers likely.
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ABOUT THIS FORECAST

Last Update: 1003 AM EDT Mon Sep 20 2021
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