Heavy Rainfall Possible Over Portions of the Gulf Coast and Southeast

Unsettled weather will continue across the Southeast and Gulf Coast with periodic showers and thunderstorms through at least Wednesday. Rainfall amounts may exceed three inches in some locales. Elsewhere, a few severe thunderstorms are possible for the Ohio Valley and central Plains through Tuesday.
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Last Update: 1029 PM EDT Mon May 21 2018

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Key West, FL Local Forecast Office

4NM ESE Alligator Reef Light FL

Marine Zone Forecast


...SMALL CRAFT ADVISORY IN EFFECT...
Synopsis: An Atlantic ridge of high pressure will extend across the Southeastern United States Tuesday through Wednesday, before shifting southward down the Florida peninsula Wednesday night. This ridge of high pressure will retreat eastward Thursday and Thursday night. A weak area of low pressure will move northward into the central or eastern Gulf of Mexico Friday through Saturday.

The Approximate Shoreward Edge of the Gulf Stream current, as of May 19th,

29 NM South of Dry Tortugas Light, on Loggerhead Key. 9 NM South of Cosgrove Shoal Light, off the Marquesas Keys. 8 NM South of Sand Key Light, off Key West. 12 NM South of Looe Key, off Big Pine Key. 14 NM South of Sombrero Key Light, off Marathon. 15 NM Southeast of Alligator Reef Light, off Islamorada. 11 NM Southeast of Molasses Reef Light, off Key Largo. 7 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Overnight
East to southeast winds 20 to 25 knots. Seas 6 to 8 feet. Numerous showers and scattered thunderstorms.
Tuesday
East to southeast winds near 20 knots. Seas 5 to 7 feet. Numerous showers and isolated thunderstorms.
Tuesday Night
Southeast winds near 20 knots, decreasing to 15 to 20 knots after midnight. Seas 5 to 7 feet, subsiding to 4 to 6 feet. Numerous showers and isolated thunderstorms.
Wednesday And Wednesday Night
Southeast winds near 15 knots. Seas 3 to 5 feet. Scattered showers and thunderstorms.
Thursday
Southeast winds near 15 knots. Seas 3 to 5 feet. Numerous showers and isolated thunderstorms.
Thursday Night And Friday
Southeast winds near 15 knots. Seas 3 to 5 feet. Numerous showers and isolated thunderstorms.
Friday Night
Southeast winds 15 to 20 knots. Seas 4 to 6 feet. Numerous showers and isolated thunderstorms.
Saturday
Southeast to south winds 15 to 20 knots. Seas 4 to 6 feet. Numerous showers and isolated thunderstorms.
Saturday Night
South winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers and isolated thunderstorms.
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Last Update: 1029 PM EDT Mon May 21 2018
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