Active Weather From the Upper Midwest to the East Coast

A strong cold front will impact the entire east coast this weekend with much cooler temperatures and gusty winds. Heavy snow and strong winds in the Upper Midwest will transition into the Northeast this weekend, and severe weather in the Ohio Valley will move into the Mid-Atlantic as a marginal risk. Out west, a cold weather system will bring more rain, and some areas of low elevation snow.
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Last Update: 1014 AM EST SAT FEB 25 2017

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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: A WEAK PRESSURE GRADIENT WILL ENVELOP THE KEYS AREA THROUGH SUNDAY CREATING PLEASANT BOATING CONDITIONS. A WEAK FRONTAL BOUNDARY WILL APPROACH THE ISLAND CHAIN SUNDAY NIGHT.

THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM CURRENT...AS OF FEBRUARY 25TH...

45 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY. 15 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS. 11 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST. 14 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY. 15 NM SOUTH OF SOMBRERO KEY LIGHT...OFF MARATHON. 12 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA. 11 NM SOUTHEAST OF MOLASSES REEF LIGHT...OFF KEY LARGO. 12 NM EAST OF CARYSFORT REEF LIGHT...OFF OCEAN REEF.

GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.

This Afternoon
Variable winds near 5 knots...becoming northwest and increasing to near 10 knots. Seas 1 foot or less. nearshore waters smooth...becoming a light chop.
Tonight
North winds 10 to 15 knots. Seas around 1 foot. nearshore waters a light to moderate chop.
Sunday
Northeast to east winds 10 to 15 knots. Seas around 1 foot. Nearshore waters a light to moderate chop.
Sunday Night
East winds near 15 knots. Seas 1 to 2 feet. nearshore waters a moderate chop.
Monday
East to southeast winds near 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate chop. Isolated showers.
Monday Night
East winds near 15 knots. Seas 1 to 2 feet. nearshore waters a moderate chop. Scattered showers.
Tuesday And Tuesday Night
East to southeast winds 10 to 15 knots. Seas around 1 foot. Nearshore waters a light to moderate chop. Isolated showers.
Wednesday
East to southeast winds near 10 knots. Seas 1 foot or less. Nearshore waters a light chop. Isolated showers.
Wednesday Night
Southeast to south winds near 10 knots. Seas 1 foot or less. Nearshore waters a light chop. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 1014 AM EST SAT FEB 25 2017
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