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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Coastal Waters Forecast for Coastal waters from Cape Shoalwater WA to Cascade Head OR out 10 nm (PZZ250) (Text-Only)
NWS Forecast for: Coastal waters from Cape Shoalwater WA to Cascade Head OR out 10 nm (PZZ250)
Issued by: National Weather Service Portland, OR
Last Update: 244 AM PST Mon Dec 18 2017
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Today: SW wind 15 kt with gusts to 20 kt, becoming W 5 to 10 kt in the morning, then backing to SE in the afternoon. Wind waves W 2 ft at 5 seconds, shifting to the S 4 ft at 4 seconds in the afternoon. W swell 7 ft at 11 seconds. Rain likely.

Tonight: S wind 15 to 20 kt, rising to 25 to 30 kt after midnight. Combined seas 10 ft with a dominant period of 15 seconds. Rain.

Tue: S wind 30 kt, becoming SW 20 to 25 kt in the afternoon. Gusts to 40 kt, becoming 35 kt late. Combined seas 14 ft with a dominant period of 15 seconds. Rain in the morning, then showers in the afternoon.

Tue Night: W wind 20 to 25 kt. Wind waves W 5 ft at 6 seconds. W swell 14 ft at 14 seconds, subsiding to 11 ft at 14 seconds after midnight. Showers.

Wed: NW wind 15 to 20 kt, becoming N 10 to 15 kt in the afternoon. Wind waves NW 4 ft at 5 seconds. NW swell 12 ft at 14 seconds. Chance of showers.

Wed Night: NE wind 5 to 10 kt. Wind waves NW 4 ft at 5 seconds. W swell 12 ft at 14 seconds.

Thu: S wind to 5 kt. Wind waves 1 ft. NW swell 9 ft.

Fri: N wind 10 to 15 kt. Wind waves 2 ft. NW swell 8 ft.



Zone Forecast: Coastal waters from Cape Shoalwater WA to Cascade Head OR out 10 nm (PZZ250)

Visit your local NWS office at: http://www.wrh.noaa.gov/pqr