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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Last Update: 432 AM EST Mon Dec 18 2017

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Key West, FL Local Forecast Office

33NM S Sand Key Light FL

Marine Zone Forecast


...SMALL CRAFT SHOULD EXERCISE CAUTION...
Synopsis: A high pressure cell will persist from the subtropical North Atlantic to the eastern Gulf of Mexico through Friday.

The Approximate Shoreward Edge of the Gulf Stream as of December 16, 2017,

30 NM South of Dry Tortugas Light, on Loggerhead Key. 17 NM South of Cosgrove Shoal Light, off the Marquesas Keys. 26 NM South of Sand Key Light, off Key West. 32 NM South of Looe Key, off Big Pine Key. 29 NM South of Sombrero Key Light, off Marathon. 14 NM Southeast of Alligator Reef Light, off Islamorada. 9 NM Southeast of Molasses Reef Light, off Key Largo. 6 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Today
East winds 15 to 20 knots. Seas 4 to 6 feet.
Tonight
East winds 15 to 20 knots. Seas 4 to 6 feet.
Tuesday
East winds 15 to 20 knots. Seas 3 to 5 feet.
Tuesday Night
East winds near 15 knots. Seas 3 to 5 feet.
Wednesday
East to southeast winds 10 to 15 knots. Seas 2 to 4 feet.
Wednesday Night
East to southeast winds 10 to 15 knots. Seas 1 to 3 feet.
Thursday
East to southeast winds 10 to 15 knots. Seas 1 to 3 feet.
Thursday Night
East to southeast winds 10 to 15 knots. Seas 2 to 4 feet.
Friday
East winds 15 to 20 knots. Seas 3 to 5 feet.
Friday Night
East to southeast winds 15 to 20 knots. Seas 3 to 5 feet.
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Last Update: 432 AM EST Mon Dec 18 2017
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