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: 258 AM PST Mon Dec 18 2017

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Seattle, WA Local Forecast Office

24NM NW Forks WA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH

Synopsis: PZZ100-182000- 258 AM PST Mon Dec 18 2017 .Synopsis for the northern and central Washington coastal and inland waters...A frontal system over the area will sag south this morning. A second vigorous frontal system will move through the area tonight and Tuesday. An associated deepening surface low will cross the waters Tuesday. Offshore flow will develop Wednesday and continue Thursday and Friday. $$

Today
NW wind 10 to 20 kt becoming W to 10 kt in the afternoon. Wind waves 1 to 3 ft subsiding to 1 ft or less in the afternoon. W swell 9 ft at 11 seconds. A slight chance of rain in the morning then a chance of rain in the afternoon.
Tonight
E wind to 10 kt rising to 15 to 25 kt after midnight. Wind waves 2 ft or less building to 2 to 4 ft after midnight. W swell 8 ft at 14 seconds. Rain.
Tue
S wind 15 to 25 kt becoming SW 20 to 30 kt in the afternoon. Wind waves 3 to 5 ft building to 5 to 7 ft in the afternoon. W swell 9 ft at 14 seconds building to 11 ft at 14 seconds in the afternoon. Rain in the morning then rain likely in the afternoon.
Tue Night
W wind 15 to 25 kt becoming N 5 to 15 kt after midnight. Wind waves 3 to 5 ft subsiding to 2 ft or less after midnight. W swell 12 ft at 12 seconds.
Wed
NE wind 5 to 15 kt. Wind waves 2 ft or less. W swell 11 ft at 12 seconds.
Wed Night
E wind to 10 kt. Wind waves 1 ft or less. W swell 10 ft at 11 seconds.
Thu
SE wind to 10 kt becoming SW. Wind waves 1 ft or less. W swell 6 ft.
Fri
NE wind 5 to 15 kt. Wind waves 2 ft or less. W swell 6 ft.
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ABOUT THIS FORECAST

Last Update: 258 AM PST Mon Dec 18 2017
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