Storm Moving Through the Upper Midwest to the Northeast

Heavy rain and the potential for strong thunderstorms along and east of the Appalachians will precede a cold front, while snow showers will fall behind the front in the Ohio Valley, Upper Midwest and Great Lake States. Rain-on-snow flooding is possible in portions of New England and New York State. Rain and high elevation snow will return to the west.
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Last Update: 426 PM EST SAT FEB 25 2017

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Key West, FL Local Forecast Office

6NM NW Cosgrove Shoal Light 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. 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.

Tonight
West to northwest winds 5 to 10 knots...becoming northwest to north 10 to 15 knots. Seas 1 foot or less...building to 1 to 2 feet. Nearshore waters smooth to a light chop...becoming a light to moderate chop.
Sunday
North to northeast winds 10 to 15 knots early...becoming northeast to east. Seas around 2 feet. Nearshore waters a light to moderate chop.
Sunday Night
East winds 10 to 15 knots...increasing to 15 to 20 knots. Seas building to 2 to 4 feet. Nearshore waters a light to moderate chop...becoming choppy.
Monday
East winds 15 to 20 knots early...decreasing to near 15 knots. Seas 2 to 4 feet. Nearshore waters choppy...becoming a moderate chop. Isolated showers.
Monday Night
East to southeast winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers.
Tuesday
East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers.
Tuesday Night
East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers.
Wednesday
East to southeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers.
Wednesday Night
Southeast to south winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers.
Thursday
Variable winds near 10 knots. Seas 1 to 2 feet. nearshore waters a light chop. Isolated showers.
Thursday Night
Winds becoming north to northeast and increasing to near 15 knots. Seas 1 to 3 feet. Nearshore waters becoming a moderate chop. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 426 PM EST SAT FEB 25 2017
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