Unsettled in the South; Pacific Storm on the West Coast

Showers and a few strong to severe thunderstorms associated with a system in southeastern Texas. A strong and cold Pacific storm will produce heavy rain and heavy mountain snow, and strong, gusty winds for parts of the West coast. Gusty winds ahead of this system may produce critical fire weather threats in the North and Central Plains this weekend. Lake effect snows persist in the Northeast.
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Last Update: 429 PM EST Fri Mar 5 2021

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Key West, FL Local Forecast Office

5NM E Vaca Cut FL

Marine Zone Forecast


Synopsis: A stalled trough of low pressure will linger across the Bahamas and the Straits of Florida tonight. An area of low pressure will dive southeastward through the eastern Gulf of Mexico and across the southern half of Florida Saturday and Saturday evening, pushing a frontal boundary through the coastal waters of the Florida Keys. Freshening north breezes Saturday night will become strong and turn to the northeast on Sunday and Sunday night. Strong northeast to east breezes will persist Monday through Tuesday night, then diminish somewhat Wednesday and Wednesday night.

The Approximate Shoreward Edge of the Gulf Stream as of March 04...

58 NM South of Dry Tortugas Light...on Loggerhead Key. 42 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 32 NM South of Sand Key Light...off Key West. 18 NM South of Looe Key...off Big Pine Key. 13 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.

Tonight
Northeast to east winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers developing.
Saturday
Northeast to east winds near 10 knots, becoming south in the afternoon. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers developing.
Saturday Night
West winds 10 to 15 knots, becoming north and increasing to 15 to 20 knots overnight. Seas 1 to 2 feet, building to 1 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms.
Sunday
North to northeast winds near 20 knots. Seas 2 to 4 feet, except 3 to 5 feet west of cosgrove shoal. Nearshore waters rough. Isolated showers in the morning.
Sunday Night
Northeast winds increasing to near 25 knots. Seas 3 to 6 feet. Nearshore waters becoming extremely rough.
Monday
Northeast to east winds 20 to 25 knots. Seas 3 to 6 feet. Nearshore waters very rough.
Monday Night And Tuesday
Northeast to east winds 20 to 25 knots. Seas 3 to 6 feet. Nearshore waters very rough.
Tuesday Night
Northeast to east winds 20 to 25 knots. Seas 3 to 6 feet. Nearshore waters very rough. Isolated showers.
Wednesday
Northeast to east winds near 20 knots. Seas 3 to 5 feet. Nearshore waters rough. Isolated showers.
Wednesday Night
Northeast to east winds near 20 knots. Seas 3 to 5 feet. Nearshore waters rough. Isolated showers.
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Last Update: 429 PM EST Fri Mar 5 2021
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