Heavy Snow & Ice Across Portions of the Plains and Midwest; Unsettled in the Pacific Northwest

Heavy snow and freezing rain will impact portions of the Plains, upper Midwest, and Great Lakes into Monday. Significant snow accumulations and gusty winds are likely in some areas. Farther to the south, rain and a few thunderstorms are expected over the Mississippi, Tennessee, and Ohio Valleys. Heavy rain & mountain snowfall will also continue from northern California into the Pacific Northwest.
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Hazardous Weather Conditions

Last Update: 1031 AM EST Sun Jan 21 2018

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Miami - South Florida Local Forecast Office

10NM E Virginia Key FL

Marine Zone Forecast


...SMALL CRAFT SHOULD EXERCISE CAUTION FOR WINDS...
Synopsis: High pressure, to the north, is forecast to keep the easterly wind in place through the beginning of the week. Seas are forecast to slowly subside to 1 to 2 feet in the Atlantic and 1 foot or less in the Gulf by Monday afternoon. A cold front will push into the area Tuesday afternoon into Tuesday evening. This will bring a chance for showers to the region beginning Tuesday morning. Showers will continue to be possible through the remainder of the week, as the front stalls just south of the area. Strong high pressure will build in behind the front, bringing a fresh to strong breeze to the region for the latter half of the week.

.GULF STREAM HAZARDS...None.

The approximate location of the west wall of the Gulf Stream as of Jan 19, 2018 at 1200 UTC...

6 nautical miles east southeast of Fowey Rocks. 12 nautical miles east northeast of Port Everglades. 5 nautical miles east of Lake Worth. 11 nautical miles east of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Today
East winds 15 to 20 knots. Seas 2 to 4 feet. period 4 seconds. Intracoastal waters choppy in exposed areas. A slight chance of light showers in the morning.
Tonight
East winds 10 to 15 knots along the coast to east 15 to 20 knots in the gulf stream. Seas 2 to 4 feet with occasional seas to 5 feet. Period 4 seconds. Intracoastal waters choppy in exposed areas.
Monday
East winds 10 to 15 knots. Seas 2 to 3 feet. Period 4 seconds. Intracoastal waters a moderate chop.
Monday Night
East southeast winds 5 to 10 knots along the coast to east southeast 10 to 15 knots in the gulf stream. Seas 2 to 3 feet. Period 4 seconds. Intracoastal waters a moderate chop. A slight chance of showers after midnight.
Tuesday
East winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters a light chop. A slight chance of showers in the morning...then a chance of showers in the afternoon.
Tuesday Night
Northeast winds 5 to 10 knots along the coast to east northeast 5 to 10 knots in the gulf stream. Seas around 2 feet. Intracoastal waters a light chop. A chance of showers.
Wednesday
Northeast winds 10 to 15 knots. Seas around 2 feet building to 2 to 4 feet with occasional seas to 5 feet in the afternoon. Intracoastal waters a moderate chop. A slight chance of showers.
Wednesday Night
Northeast winds around 15 knots along the coast to northeast 15 to 20 knots in the gulf stream. Seas 2 to 4 feet with occasional seas to 5 feet along the coast and 4 to 6 feet with occasional to 8 feet in the gulf stream. Intracoastal waters choppy in exposed areas. A slight chance of showers.
Thursday
Northeast winds 15 to 25 knots. Seas 4 to 6 feet with occasional seas to 8 feet. Intracoastal waters rough in exposed areas. A slight chance of showers.
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ABOUT THIS FORECAST

Last Update: 1031 AM EST Sun Jan 21 2018
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