Widespread, Significant Severe Storms; Blistering Heat; Persistent Monsoon and Fire Weather Threats

A swath of severe weather is forecast from the Middle South to the Great Lakes. Very large hail, significant damaging winds, and tornadoes will be possible; especially; from northwestern Tennessee to southwestern Ohio. The south-central U.S. remains excessively hot, with Heat Indices over 110 degrees. Monsoon moisture continues threats of local flash floods, and dry thunderstorms in the west.
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Hazardous Weather Conditions

Last Update: 1028 AM EDT Fri Jul 20 2018

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Key West, FL Local Forecast Office

3NM SE Key Largo FL

Marine Zone Forecast


Synopsis: A weak pressure pattern will prevail this afternoon into early next week.

The Approximate Shoreward Edge of the Gulf Stream current, as of July 19th, 2018.

51 NM South of Dry Tortugas Light...on Loggerhead Key. 41 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 32 NM South of Sand Key Light...off Key West. 17 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. 8 NM Southeast of Molasses Reef Light...off Key Largo. 3 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

This Afternoon
South winds near 5 knots, becoming variable late. Seas 1 foot or less. Nearshore waters smooth. Isolated showers and thunderstorms.
Tonight
Variable winds 5 to 10 knots. Seas 1 foot or less. nearshore waters mostly smooth. Isolated showers and thunderstorms. .saturday through sunday..mainly west winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters mostly smooth. Isolated showers and thunderstorms.
Sunday Night
Mainly west winds 5 to 10 knots. Seas 1 foot or less. Isolated showers and thunderstorms. through tuesday night...variable winds 5 to 10 knots. seas 1 foot or less. Nearshore waters mostly smooth. Scattered showers and thunderstorms.
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ABOUT THIS FORECAST

Last Update: 1028 AM EDT Fri Jul 20 2018
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