Significant Snowfall for Washington Cascades and Northern Rocky Mountains

A cold front will linger for several days from the Pacific Northwest to portions of the northern Plains early this week. Cold temperatures and copious moisture will combine to produce several feet of snow into the mountain passes, with up to 4 feet of snow down to 4000 feet in the northern Rockies. Travel through mountain passes will be very difficult.
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Hazardous Weather Conditions

Last Update: 253 AM EST Mon Dec 18 2017

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Miami - South Florida Local Forecast Office

39NM W Marco Island FL

Marine Zone Forecast


Synopsis: High pressure is forecast to keep conditions mostly quiet through the weekend, with only a brief shower possibly this morning in the portions of the Atlantic waters. Seas are forecast to run generally 1 to 3 feet through the weekend, with seas building to around 4 feet periodically east of Key Largo.

.GULF STREAM HAZARDS...None.

The approximate location of the west wall of the Gulf Stream as of Dec 16, 2017 at 1200 UTC...

5 nautical miles east of Fowey Rocks. 10 nautical miles east of Port Everglades. 7 nautical miles east of Lake Worth. 7 nautical miles northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Today
East southeast winds 5 to 10 knots. Seas around 2 feet. Period 3 seconds.
Tonight
North northeast winds 5 to 10 knots becoming east after midnight. Seas less than 2 feet. Period 3 seconds.
Tuesday
East northeast winds 5 to 10 knots. Seas less than 2 feet. Period 3 seconds.
Tuesday Night
Northeast winds 5 to 10 knots becoming east southeast after midnight. Seas less than 2 feet. Period 2 seconds.
Wednesday
South winds 5 to 10 knots. Seas less than 2 feet.
Wednesday Night And Thursday
South winds around 5 knots. Seas less than 2 feet.
Thursday Night
South southeast winds around 5 knots becoming east after midnight. Seas less than 2 feet.
Friday
East southeast winds 5 to 10 knots. Seas around 2 feet.
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ABOUT THIS FORECAST

Last Update: 253 AM EST Mon Dec 18 2017
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