Severe thunderstorms and heavy rain for portions of the southern U.S.

A storm system will produce scattered severe thunderstorms and heavy rain in portions of lower-mid Mississippi River Valley and Gulf Coast region on Saturday. Very large hail, locally damaging winds, isolated tornadoes and flash flooding are possible in this area. Some of the flooding could be significant in portions of Louisiana, Mississippi and southeast Arkansas.
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Last Update: 1018 PM EDT FRI APR 29 2016

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Key West, FL Local Forecast Office

12NM N Vaca Cut 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: GENTLE TO MODERATE EAST TO SOUTHEAST BREEZES WILL CONTINUE ACROSS THE FLORIDA KEYS COASTAL WATERS AS HIGH PRESSURE PERSISTS OVER THE WESTERN ATLANTIC. REINFORCING HIGH PRESSURE WILL EMERGE OFF THE SOUTHEAST COAST ON SATURDAY...FRESHENING WINDS OUT OF THE EAST...WHICH MAY RESULT IN CAUTIONARY HEADLINES FOR THE LATTER HALF OF THE WEEKEND.

THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM...AS OF APRIL 28TH...

14 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY. 18 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS. 18 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. 8 NM EAST OF CARYSFORT REEF LIGHT...OFF OCEAN REEF.

GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.

Overnight
East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop.
Saturday
East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop.
Saturday Night
East winds increasing to 15 to 20 knots. Seas 1 to 3 feet. Nearshore waters becoming choppy.
Sunday
East to southeast winds decreasing to 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters becoming a light to moderate chop.
Sunday Night
East winds increasing to near 15 knots. Seas 1 to 3 feet. Nearshore waters becoming a moderate chop. Isolated showers.
Monday
East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Isolated showers.
Monday Night And Tuesday
Southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Isolated showers.
Tuesday Night
Southeast to south winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers.
Wednesday
Southwest winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. Isolated showers.
Wednesday Night
West winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Isolated showers.
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Last Update: 1018 PM EDT FRI APR 29 2016
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