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 OF Northwestern Puerto Rico out 10 NM (AMZ742) (Text-Only)
NWS Forecast for: Coastal Waters OF Northwestern Puerto Rico out 10 NM (AMZ742)
Issued by: National Weather Service San Juan, PR
Last Update: 540 AM AST Mon Dec 18 2017
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Today: Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.

Tonight: Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.

Tuesday: Northeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.

Tuesday Night: Northeast winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers through the night.

Wednesday: Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. North swell around 4 feet. Isolated showers.

Thursday: Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.

Friday: Northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.



Zone Forecast: Coastal Waters OF Northwestern Puerto Rico out 10 NM (AMZ742)

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