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: 632 AM EST Mon Dec 18 2017

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13NM ENE Annapolis MD

Marine Zone Forecast


Synopsis: High pressure will control the weather pattern through Tuesday before a cold front crosses the area Tuesday night. High pressure will build to the north Wednesday into Thursday as a front stalls to the south. A Small Craft Advisory may be needed Tuesday night into Wednesday for portions of the waters.

Today
SW winds 5 kt. Waves flat.
Tonight
SW winds 5 kt. Waves flat.
Tue
SW winds 10 to 15 kt. Waves 1 to 2 ft.
Tue Night
W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Wed
NW winds 5 to 10 kt. Waves 1 ft.
Wed Night
N winds 5 to 10 kt. Waves 1 ft.
Thu
SE winds around 5 kt. Waves 1 ft or less.
Fri
S winds 10 to 15 kt. Waves 1 ft. A chance of rain through the night.
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ABOUT THIS FORECAST

Last Update: 632 AM EST Mon Dec 18 2017
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