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: 330 AM CST Mon Dec 18 2017

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45NM SE Pilottown LA

Marine Zone Forecast


Synopsis: A front has stalled well north of the coast. The next area of low pressure is expected to move east across the lower Mississippi Valley and southeast states Tuesday night into Wednesday morning which should push a weak cold front into the coastal waters on Wednesday but stall it out once again. High pressure will then move east across the region Wednesday night into Thursday. Another cold front is expected to move into the southern plains on Friday.

Today
Southwest winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Patchy fog early in the morning. Chance of showers through the day.
Tonight
East winds near 5 knots becoming southeast in the late evening and overnight. Seas 2 to 4 feet. Dominant period 6 seconds. Patchy fog.
Tuesday
Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Patchy fog early in the morning. Slight chance of showers in the afternoon.
Tuesday Night
South winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Chance of showers.
Wednesday
Southwest winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 5 seconds. Slight chance of thunderstorms early in the morning. Showers likely in the morning, then chance of showers in the afternoon.
Wednesday Night
Northwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds.
Thursday
North winds 5 to 10 knots becoming southeast in the late morning and afternoon. Seas 1 to 2 feet. Dominant period 5 seconds.
Thursday Night
Southeast winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 5 seconds.
Friday
South winds 15 to 20 knots. Seas 2 to 4 feet. Chance of showers in the afternoon.
Friday Night
Southwest winds 15 to 20 knots becoming west after midnight. Seas 3 to 5 feet. Showers likely.
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ABOUT THIS FORECAST

Last Update: 330 AM CST Mon Dec 18 2017
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