Severe Thunderstorms over the Plains, Heavy Rain Threat Continues over Portions of the Mississippi Valley

Heavy rainfall with localized flooding will remain possible over portions of the Mississippi Valley and the Plains through midweek. In addition, severe thunderstorms will be possible over the southern and central Plains. Some of the storms could contain damaging winds and large hail.
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Hazardous Weather Conditions

Last Update: 428 PM EDT Thu Aug 17 2017

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Key West, FL Local Forecast Office

6NM NW Cosgrove Shoal Light FL

Marine Zone Forecast


Synopsis: High pressure will extend across Central Florida through tonight. A low pressure system will move into the eastern Caribbean Sea Friday and Friday night. This low pressure system will progress westward through the central and western Caribbean Sea Saturday into early next week, resulting in freshening east to southeast breezes.

The Approximate Shoreward Edge of the Gulf Stream current, as of August 16th, 2017,

22 NM South of Dry Tortugas Light...on Loggerhead Key. 12 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 11 NM South of Sand Key Light...off Key West. 15 NM South of Looe Key...off Big Pine Key. 15 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. 6 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Tonight
East winds near 10 knots. Seas around 1 foot. nearshore waters a light chop. Scattered showers and isolated thunderstorms.
Friday
East winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and isolated thunderstorms.
Friday Night
East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Isolated showers and thunderstorms.
Saturday
East winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.
Saturday Night
Southeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms.
Sunday
East to southeast winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. Scattered showers and thunderstorms.
Sunday Night
East to southeast winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers and isolated thunderstorms.
Monday And Monday Night
East winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers and isolated thunderstorms.
Tuesday
East winds 10 to 15 knots. Seas 2 to 4 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.
Tuesday Night
East to southeast winds 10 to 15 knots. Seas 2 to 4 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms.
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ABOUT THIS FORECAST

Last Update: 428 PM EDT Thu Aug 17 2017
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