National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. on Saturday

Another Pacific system will impact the West Coast today. Heavy rainfall could lead to flash flooding, river and small stream flooding as well as mudslides and debris flows, especially over burn scars. Strong winds and heavy elevation snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Hazardous Weather Conditions

4NM NE Nantucket MA

Marine Point Forecast [NOTICE]

This
Afternoon

Slight Chc Showers

NNE 8kt
< 1ft

High: 41 °F

Tonight

Chance Showers

NE 8kt
1ft

Low: 37 °F

Sunday

Chance Showers

NE 8kt
1ft

High: 42 °F

Sunday
Night

Chance Sprinkles

Winds IncreasingNNE 12kt
1-2ft

Low: 37 °F

Monday

Mostly Cloudy

ENE 12kt
2ft

High: 45 °F

Monday
Night

Slight Chc Showers

Winds IncreasingE 15kt
2ft

Low: 41 °F

Tuesday

Chance Showers

E 17kt
2-3ft

High: 48 °F

Tuesday
Night

Chance Showers

ESE 18kt
4ft

Low: 45 °F

Wednesday

Rain

Winds IncreasingSE 26kt
5ft

High: 53 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:08 pm EST Dec 20, 2014
Forecast Valid: 2pm EST Dec 20, 2014-6pm EST Dec 26, 2014

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Detailed Forecast



  • SynopsisHIGH PRES WILL SETUP ACROSS QUEBEC THIS WEEKEND WILL THEN SHIFT OVER NOVA SCOTIA AND THE CANADIAN MARITIMES MON AND TUE. A RAPIDLY INTENSIFYING LOW PRES SYSTEM WILL THEN PASS WELL TO OUR WEST ACROSS THE GREAT LAKES WED INTO WED NIGHT. THIS WILL BRING A PERIOD OF STRONG WINDS AND HIGH SEAS TO THE WATERS.

    FOR INFORMATION ON POSSIBLE HAZARDOUS WEATHER BEYOND THE 24-36 HOUR FORECAST PERIOD...PLEASE VISIT WWW.WEATHER.GOV/BOSTON AND FOLLOW THE CURRENT HAZARDS LINK ABOVE THE MAP ON THE LEFT.
  • This Afternoon NNE wind 5 to 8 kt. A slight chance of showers. Seas 1 ft or less.
  • Tonight NE wind 5 to 8 kt. A chance of showers, mainly after 3am. Seas around 1 ft.
  • Sunday NE wind 6 to 8 kt. A chance of showers, mainly before 3pm, then a chance of sprinkles after 5pm. Seas around 1 ft.
  • Sunday Night NNE wind 6 to 9 kt increasing to 9 to 12 kt after midnight. A chance of sprinkles before 8pm. Seas 1 to 2 ft.
  • Monday ENE wind 10 to 12 kt becoming N in the afternoon. Mostly cloudy. Seas around 2 ft.
  • Monday Night N wind 8 to 11 kt becoming E 12 to 15 kt after midnight. A slight chance of showers after midnight. Seas around 2 ft.
  • Tuesday E wind 12 to 17 kt, with gusts as high as 23 kt. A chance of showers after 11am. Seas 2 to 3 ft.
  • Tuesday Night ESE wind 15 to 18 kt, with gusts as high as 28 kt. A chance of showers. Seas around 4 ft.
  • Wednesday SE wind 20 to 23 kt increasing to 23 to 26 kt in the afternoon. Winds could gust as high as 34 kt. Rain. Seas around 5 ft.

SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

*Notices:
  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.