National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the Pacific Northwest through late Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Hazardous Weather Conditions

Last Update: 314 PM EST SUN DEC 21 2014

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Casco Bay

Marine Zone Forecast





  • SynopsisA WEAK INVERTED TROUGH WILL LINGER THROUGH MONDAY BEFORE SHIFTING ONSHORE MONDAY NIGHT. STRONG LOW PRESSURE WELL TO THE WEST WILL DRIVE A WARM FRONT WITH A STRONG SOUTHEAST FLOW ACROSS THE WATERS WEDNESDAY AND WEDNESDAY NIGHT. A COLD FRONT CROSSES THE WATERS AND SWITCHES THE FLOW TO THE WEST ON THURSDAY.
  • Tonight N winds 5 to 10 kt. Seas 1 foot or less. A chance of snow showers. Vsby 1 to 3 nm.
  • Mon NE winds 5 to 10 kt. Seas 1 foot or less. A chance of snow showers in the morning...then a chance of rain and snow showers in the afternoon. Vsby 1 to 3 nm.
  • Mon Night E winds 5 to 10 kt. Seas 1 to 2 ft. A chance of rain and snow showers. Vsby 1 to 3 nm.
  • Tue E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain or snow in the morning...then a chance of rain in the afternoon.
  • Tue Night E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely.
  • Wed SE winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Rain.
  • Wed Night S winds 15 to 25 kt with gusts up to 35 kt. Seas 4 to 7 ft...building to 6 to 9 ft after midnight. Rain.
  • Thu SW winds 15 to 20 kt. Seas 5 to 8 ft. Numerous showers.
  • Thu Night W winds 10 to 15 kt. Seas 2 to 4 ft.
  • Fri SW winds 10 to 15 kt. Seas 2 to 3 ft.
  • Fri Night SW winds 5 to 10 kt. Seas 2 to 4 ft.



Additional Forecasts and Information

Zone Area Forecast for Casco Bay
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