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: 918 PM EST Sun Dec 17 2017

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Philadelphia, PA Local Forecast Office

20NM SSW Atlantic City NJ

Marine Zone Forecast


Synopsis: A warm front will lift northeast of our area early Monday, then a cold front moves through the Mid-Atlantic states Tuesday night. High pressure will follow by Thursday morning while an area of low pressure scoots out to sea to the east of the Carolinas. Thereafter, strengthening low pressure will track northeast from the Great Lakes region Friday, sending a warm front through our region, followed by a cold front on Saturday.

Rest Of Tonight
SE winds around 5 kt, becoming W late. Seas 2 ft or less. a slight chance of light rain late this evening.
Mon
W winds 5 to 10 kt. Seas 2 ft or less.
Mon Night
W winds 5 to 10 kt. Seas 2 ft or less. Mainly in S swell with a dominant period of 9 seconds.
Tue
W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the late morning and afternoon. Seas 2 ft or less. Mainly in SE swell with a dominant period of 9 seconds.
Tue Night
SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas around 3 ft.
Wed
NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft.
Wed Night
N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 3 ft.
Thu
N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 3 ft in the morning, then 2 ft or less.
Thu Night
NE winds around 5 kt, becoming E after midnight. Seas 2 ft or less.
Fri
SE winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft or less.
Fri Night
S winds 10 to 15 kt. Seas 3 to 5 ft. A chance of rain.
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ABOUT THIS FORECAST

Last Update: 918 PM EST Sun Dec 17 2017
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