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: 634 PM EST Sun Dec 17 2017

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New York, NY Local Forecast Office

17NM SE Islip NY

Marine Zone Forecast


Synopsis: ANZ300-181230- 634 PM EST Sun Dec 17 2017 .Synopsis for the Long Island Waters and New York Harbor... A warm front approaches from the south tonight. Weak low pres tracks across the waters on Monday. A cold front approaches on Tuesday and passes through the region Tuesday Night, with high pressure building in for the mid to late week. $$

Tonight
E winds 5 to 10 kt, increasing to 10 to 15 kt late. seas 1 to 2 ft. Slight chance of light rain early this evening, then chance of light rain late this evening. Light rain likely after midnight.
Mon
S winds 5 to 10 kt, becoming W in the afternoon. Seas 1 ft or less. Chance of light rain in the morning.
Mon Night
W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Tue
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.
Tue Night
W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 7 ft.
Wed
NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft.
Wed Night
NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Thu
NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Thu Night
SW winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft.
Fri
S winds 10 to 15 kt. Seas around 3 ft.
Fri Night
S winds 15 to 20 kt. Seas 3 to 5 ft. Chance of showers in the evening, then chance of rain after midnight.
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Last Update: 634 PM EST Sun Dec 17 2017
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