Severe Weather Threatens the Southern U.S. on Monday and Tuesday

There is an Enhanced Risk of severe weather for the Tennessee River Valley today, with the potential for strong tornadoes, very large hail and damaging winds. The Enhanced Risk continues on Tuesday, this time for northern Florida and coastal Georgia and South Carolina, where a corridor of severe winds, and perhaps a couple tornadoes, will be possible.

Last Update: 1021 AM EDT Mon Mar 19 2018

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Key West, FL Local Forecast Office

35NM SE Sombrero Key Light FL

Marine Zone Forecast

Synopsis: An Atlantic ridge of high pressure will extend across Cuba today and tonight. A cold front will progress southward down the Florida peninsula Tuesday. This cold front will pass through the Florida Keys Tuesday night. An area of high pressure over the Southeastern United States will build southeastward down the Florida peninsula Wednesday through Friday.

The Approximate Shoreward Edge of the Gulf Stream current, as of March 17th, 2018.

52 NM South of Dry Tortugas Light, on Loggerhead Key. 11 NM South of Cosgrove Shoal Light, off the Marquesas Keys. 11 NM South of Sand Key Light, off Key West. 11 NM South of Looe Key, off Big Pine Key. 8 NM South of Sombrero Key Light, off Marathon. 8 NM Southeast of Alligator Reef Light, off Islamorada. 4 NM Southeast of Molasses Reef Light, off Key Largo. 5 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

This Afternoon
South to southwest winds near 10 knots. Seas 1 to 2 feet.
South to southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Southwest winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 2 to 4 feet, building to 4 to 5 feet. Isolated showers.
Tuesday Night
Southwest to west winds 15 to 20 knots, shifting to northwest after midnight. Seas 4 to 6 feet. Scattered showers and isolated thunderstorms.
Northwest winds 15 to 20 knots. Seas 4 to 6 feet.
Wednesday Night
Northwest to north winds near 20 knots. Seas 5 to 7 feet.
North winds near 20 knots, decreasing to near 15 knots in the afternoon. Seas 5 to 7 feet, subsiding to 4 to 6 feet.
Thursday Night
North to northeast winds 15 to 20 knots. Seas 4 to 6 feet.
Northeast winds near 15 knots. Seas 3 to 5 feet.
Friday Night
Northeast to east winds near 15 knots. Seas 3 to 5 feet.
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Last Update: 1021 AM EDT Mon Mar 19 2018
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