Snow and Ice Continue in the Northeast; Bitterly Cold Wind Chills; Rain and Mountain Snow in the West

Significant winter impacts shift into the Northeast. Heavy snow up to 2 feet will be possible across interior Northeastern areas. Southern New England may see ice accumulations up to a quarter of an inch. Strong gusty winds and bitter cold will follow the cold front passage. In the west, heavy mountain snow will impact the California, Inter-Mountain West, and Rocky Mountains.
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Last Update: 1026 AM EST Sun Jan 20 2019

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Key West, FL Local Forecast Office

3NM SE Key Largo FL

Marine Zone Forecast


...SMALL CRAFT ADVISORY IN EFFECT...
Synopsis: A strong cold front will exit the eastern Straits of Florida by early this afternoon. In the wake of the cold front, strong northwest winds will prevail this afternoon and evening. Northerly winds will gradually ease late tonight and Monday morning, with a relative lull expected Monday afternoon. Northeast to east breezes will begin to freshen Monday night, then strong high pressure off the mid Atlantic coast will cause fresh to strong east to southeast winds over the Keys waters Tuesday through Wednesday. The next cold front is forecast to move through the Keys late Thursday.

The Approximate Shoreward Edge of the Gulf Stream is currently unavailable.

This Afternoon
West to northwest winds near 20 knots, increasing to near 25 knots by early afternoon. Seas 2 to 5 feet. West of cosgrove shoal light, seas 5 to 6 feet building to 5 to 9 feet in the afternoon. Nearshore waters rough, becoming extremely rough. Scattered showers late in the morning.
Tonight
Northwest to north winds 20 to 25 knots. Seas 2 to 5 feet, except 5 to 8 feet west of cosgrove shoal light. Nearshore waters very rough.
Monday
North to northeast winds near 20 knots early, becoming northeast to east and decreasing to near 15 knots. Seas 2 to 5 feet. Nearshore waters rough, becoming a moderate chop.
Monday Night
Northeast to east winds increasing to 15 to 20 knots. Seas 2 to 5 feet. Nearshore waters becoming choppy. isolated showers after midnight.
Tuesday
East winds 20 to 25 knots. Seas 3 to 6 feet. Nearshore waters very rough. Isolated showers.
Tuesday Night
East to southeast winds 20 to 25 knots. Seas 3 to 6 feet. Nearshore waters very rough. Isolated showers.
Wednesday
Southeast winds near 20 knots. Seas 3 to 6 feet. Nearshore waters rough. Isolated showers.
Wednesday Night
Southeast to south winds 15 to 20 knots. Seas 3 to 6 feet. Nearshore waters choppy. Scattered showers and isolated thunderstorms.
Thursday
South to southwest winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Numerous showers and isolated thunderstorms.
Thursday Night
Northwest winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers.
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Last Update: 1026 AM EST Sun Jan 20 2019
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