Heavy rain and severe weather possible from the northern/central Plains to the Upper Midwest

Heavy rainfall and severe thunderstorms are expected across portions of the northern and central Plains, pushing eastward into the Upper Midwest by Wednesday. These severe thunderstorms may be capable of producing large hail and damaging winds, and possibly some tornadoes.
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Last Update: 1023 PM EDT Tue Jun 27 2017

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Key West, FL Local Forecast Office

6NM NW Cosgrove Shoal Light FL

Marine Zone Forecast


Synopsis: A weak surface ridge will extend into Bahamas overnight through tomorrow. A ridge of high pressure will exit the eastern United States tomorrow afternoon, resulting in freshening breezes from the east to southeast.

The Approximate Shoreward Edge of the Gulf Stream as of June 27, 2017...

60 NM South of Dry Tortugas Light, on Loggerhead Key. 38 NM South of Cosgrove Shoal Light, off the Marquesas Keys. 30 NM South of Sand Key Light, off Key West. 22 NM South of Looe Key, off Big Pine Key. 20 NM South of Sombrero Key Light, off Marathon. 14 NM Southeast of Alligator Reef Light, off Islamorada. 10 NM Southeast of Molasses Reef Light, off Key Largo. 8 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Overnight
Southeast winds near 5 knots. Seas 1 foot or less. nearshore waters smooth. Isolated showers and thunderstorms.
Wednesday Through Thursday
East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms.
Thursday Night
East to southeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.
Friday
East winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.
Friday Night Through Saturday Night
East to southeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers and thunderstorms.
Sunday And Sunday Night
East winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.
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ABOUT THIS FORECAST

Last Update: 1023 PM EDT Tue Jun 27 2017
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