Heavy rain and flash flooding possible in portions of the Southwest this weekend

An upper-level low in the Southwest U.S. will act as a trigger for thunderstorms this weekend. The area of greatest concern is in New Mexico, southeast Utah and portions of southern Colorado. Storms will be slow moving and could bring several rounds of rain to the same areas. Rainfall amounts may exceed 3 inches in localized areas. Flash Flood Watches are in effect.
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Last Update: 1026 AM EDT Sun Aug 20 2017

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Key West, FL Local Forecast Office

3NM NNE Florida Bay FL

Marine Zone Forecast


Synopsis: A tropical wave over our area will move into the southeast Gulf of Mexico late this afternoon and tonight. High pressure from the Atlantic will build across the Florida peninsula before another weak tropical wave approaches our area late Monday and Tuesday.

The Approximate Shoreward Edge of the Gulf Stream as of August 19th, 2017,

2 NM South of Dry Tortugas Light...on Loggerhead Key. 5 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 6 NM South of Sand Key Light...off Key West. 11 NM South of Looe Key...off Big Pine Key. 11 NM South of Sombrero Key Light...off Marathon. 11 NM Southeast of Alligator Reef Light...off Islamorada. 9 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
East to southeast winds near 10 knots, increasing to 10 to 15 knots. Bay waters a light chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms.
Tonight
East winds increasing to 15 to 20 knots. Bay waters becoming choppy. Scattered showers and isolated thunderstorms.
Monday
East winds 15 to 20 knots. Bay waters choppy. Isolated showers.
Monday Night
East winds 15 to 20 knots, decreasing to near 15 knots after midnight. Bay waters choppy, becoming a moderate chop. Scattered showers and isolated thunderstorms.
Tuesday
East to southeast winds near 10 knots. Bay waters a light chop. Scattered showers and isolated thunderstorms.
Tuesday Night And Wednesday
Southeast winds near 10 knots. Bay waters a light chop. Scattered showers and isolated thunderstorms.
Wednesday Night
Southeast to south winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms.
Thursday
South winds near 10 knots. Bay waters a light chop. scattered showers and isolated thunderstorms.
Thursday Night
South winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and isolated thunderstorms.
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Last Update: 1026 AM EDT Sun Aug 20 2017
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