Severe thunderstorms likely from the Midwest to the Mississippi Valley

Severe thunderstorms capable of producing damaging winds, very large hail, and a few strong tornadoes are likely today and tonight from the Midwest to the lower Mississippi Valley region. Some of the storms could produce heavy rainfall and flooding of low lying areas.
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Last Update: 1003 AM EDT WED APR 26 2017

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Key West, FL Local Forecast Office

5NM W Florida Bay FL

Marine Zone Forecast

SEAS ARE GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

Synopsis: AN AREA OF HIGH PRESSURE GRADUALLY WILL EXPAND AND INTENSIFY ACROSS THE SOUTHEASTERN UNITED STATES AND ADJACENT GULF AND ATLANTIC COASTAL WATERS FROM THROUGH FRIDAY NIGHT. THIS EVOLUTION WILL LEAD TO FRESHENING EAST TO SOUTHEAST BREEZES AND BUILDING SEAS ACROSS FLORIDA KEYS COASTAL WATERS FROM THURSDAY NIGHT THROUGH SATURDAY...WITH FRESH TO STRONG BREEZES LIKELY PERSISTING ON SUNDAY.

THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF APRIL 25...

47 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY. 25 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS. 20 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST. 26 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY. 30 NM SOUTH OF SOMBRERO KEY LIGHT...OFF MARATHON. 13 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA. 10 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.

This Afternoon
Southeast winds 5 to 10 knots. Bay waters smooth to a light chop.
Tonight
Southeast winds 10 to 15 knots. Bay waters a light to moderate chop.
Thursday
Southeast to south winds 10 to 15 knots. Bay waters a light to moderate chop.
Thursday Night
East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop.
Friday
East to southeast winds near 15 knots. Bay waters a moderate chop.
Friday Night
East to southeast winds 15 to 20 knots. Bay waters choppy. Isolated showers.
Saturday Through Sunday Night
East to southeast winds near 20 knots. Bay waters rough. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 1003 AM EDT WED APR 26 2017
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