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: 1017 PM EST Sun Dec 17 2017

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New York, NY Local Forecast Office

17NM SE Islip NY

Marine Zone Forecast


Synopsis: ANZ300-181545- 1017 PM EST Sun Dec 17 2017 .Synopsis for the Long Island Waters and New York Harbor... A warm front approaches from the south overnight. Weak low pressure tracks across the waters on Monday, then exits to the northeast Monday night. A cold front approaches on Tuesday and passes through the region Tuesday Night, with high pressure building from Wednesday through Friday. $$

Overnight
E winds 5 to 10 kt. Seas 1 ft or less. Slight chance of rain and freezing rain late this evening, then chance of freezing rain. Rain. Vsby 1 to 3 nm late this evening and early morning.
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 building to 2 to 3 ft.
Tue
W winds 15 to 20 kt with gusts up to 25 kt. Seas building to 3 to 5 ft.
Tue Night
W winds 20 to 25 kt with gusts up to 30 kt. Seas building to 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 subsiding to 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 building to 3 to 5 ft. chance of showers in the evening, then chance of rain after midnight.
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Last Update: 1017 PM EST Sun Dec 17 2017
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