Fall Weather Pattern Arrives

Rain and much cooler temperatures behind a cold front will bring a feeling of fall to the east coast today. In addition, an active fall storm pattern developing in the Pacific Northwest this week will bring areas of heavy rains, and very high elevations could receive heavy snow. Wetting rains to the valley floors will spread south Thu and Fri into northern California,where active fires continue.
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Last Update: 430 AM EDT Tue Oct 17 2017

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Key West, FL Local Forecast Office

11NM ESE Sombrero Key Light FL

Marine Zone Forecast


Synopsis: A weak pressure pattern will persist across Florida Keys coastal waters this morning, with resulting light or gentle breezes prevailing. A high pressure system will build gradually across the southeastern United States and adjacent coastal waters this week. As a result, northeast to east breezes will freshen slowly across Keys coastal waters, from Wednesday through Saturday.

The Approximate Shoreward Edge of the Gulf Stream as of October 14, 2017,

18 NM South of Dry Tortugas Light...on Loggerhead Key. 27 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 30 NM South of Sand Key Light...off Key West. 6 NM South of Looe Key...off Big Pine Key. 3 NM South of Sombrero Key Light...off Marathon. 3 NM Southeast of Alligator Reef Light...off Islamorada. 1 NM Southeast of Molasses Reef Light...off Key Largo. 1 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Today
Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers in the morning, then scattered showers and isolated thunderstorms in the afternoon.
Tonight
Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms.
Wednesday
Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.
Wednesday Night
Northeast to east winds near 15 knots. Seas 3 to 5 feet. Scattered showers and isolated thunderstorms.
Thursday
Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.
Thursday Night
Northeast to east winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.
Friday
Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet. Scattered showers and isolated thunderstorms.
Friday Night
East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers and isolated thunderstorms.
Saturday
East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers and isolated thunderstorms.
Saturday Night
East to southeast winds near 15 knots. Seas 4 to 6 feet. Scattered showers and isolated thunderstorms.
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ABOUT THIS FORECAST

Last Update: 430 AM EDT Tue Oct 17 2017
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