Arctic Air Plunges into the Great Lakes, Northeast and Mid-Atlantic

Arctic air dropping through the northern and eastern U.S. and a storm off the east coast will bring periods of snow, very cold wind chills and hazardous traveling conditions from the Upper Great Lakes to the Northeast. Meanwhile in southern California, Santa Ana winds will decrease but hot, dry air will remain over the area with elevated fire weather conditions.
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Hazardous Weather Conditions

Last Update: 318 PM EST Wed Dec 13 2017

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Miami - South Florida Local Forecast Office

4NM WSW Marco Island FL

Marine Zone Forecast


Synopsis: High pressure will build across South Florida the next few days leading to light and somewhat variable winds. A weak frontal passage on Saturday will bring stronger northeasterly flow around 15 knots, veering easterly on Sunday. No significant rain chances through the period.

.GULF STREAM HAZARDS...None.

The approximate location of the west wall of the Gulf Stream as of Dec 12, 2017 at 1200 UTC...

2 nautical miles east northeast of Fowey Rocks. 5 nautical miles east southeast of Port Everglades. 9 nautical miles east southeast of Lake Worth. 7 nautical miles east southeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Tonight
Nearshore, north winds 5 knots becoming northeast after midnight. Offshore, north northwest winds 5 to 10 knots becoming west southwest after midnight. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Period 6 seconds. Bay and inland waters smooth.
Thursday
East southeast winds 5 knots becoming south in the afternoon. Seas around 2 feet. Period 6 seconds. Bay and inland waters smooth.
Thursday Night
Southeast winds 5 knots. Seas less than 2 feet. Period 5 seconds. Bay and inland waters smooth.
Friday
Southeast winds 5 knots becoming southwest in the afternoon. Seas less than 2 feet. Period 5 seconds. Bay and inland waters smooth.
Friday Night
North northeast winds 5 to 10 knots. Seas less than 2 feet. Bay and inland waters a light chop.
Saturday
Northeast winds 5 to 10 knots. Seas less than 2 feet. Bay and inland waters a light chop.
Saturday Night
East northeast winds 10 to 15 knots nearshore and east 10 to 15 knots offshore. Seas around 2 feet. Bay and inland waters a light chop.
Sunday
East southeast winds 10 to 15 knots. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Bay and inland waters light chop.
Sunday Night
East southeast winds 5 to 10 knots nearshore and east southeast around 10 knots offshore. Seas around 2 feet. Bay and inland waters a light chop.
Monday
Southeast winds 5 to 10 knots nearshore and southeast around 10 knots offshore. Seas less than 2 feet. Bay and inland waters a light chop.
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ABOUT THIS FORECAST

Last Update: 318 PM EST Wed Dec 13 2017
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