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A rapidly developing coastal nor'easter will bring blizzard conditions to the eastern areas of Massachusetts. As the storm becomes very strong this evening and overnight, winds will increase and snowfall rates of 1 to 2 inches per hour will be common across much of coastal Massachusetts. To the west of Route 495, the snow will be less intense and the snowfall totals will be less.
Travel is not recommended this evening, especially along the coastline where the snow and wind will be most severe.
Over Cape Cod, the air is mild enough so the precipitation will begin as rain or a mix of rain and snow. After a few hours of mixed precipitation snow overtake the rain and accumulations will increase rapidly.
Blizzard warnings are in effect for Cape Cod and the Islands as well as the North Shore. Blizzard conditions occur when winds reach 35 miles per hour and visibility is lowered to one-fourth of a mile or less for a three-hour period due to snow.
Cape Cod will feel the full force of the storm with snowfall accumulating at 1 to 3 inches per hour this evening. Some roads over Cape Cod could become impassable for a time during the middle of the evening. Winds will gust over 50 miles per hour at times along the coast and power outages are likely in some places.
The core of the storm will be during the evening from about 6 p.m. until midnight. After this time the snow will begin to end over Worcester and this back edge will push eastward to the coast before sunrise Sunday. Sunshine returns for Sunday and it will be blustery and cold.
- Saturday: Snow, developing between noon and 3 p.m. and becoming heavier by dark. Rain and snow across Cape Cod/Islands. Highs in the 30s.
- Saturday night: Snow will be heavy before midnight and then begin to end. Skies will clear west of Boston by morning. Winds will increase and could cause scattered power outages along the coast. Lows falling through the 20s.
- Sunday: Sunny, with highs in the mid to upper 20s. Blustery winds continue.
- Sunday night: A mix of clouds and moonlight. Cold. Lows 5-15. Winds remain busy.
- Monday: Sunny, with a high in the mid 20s.
- Monday night: A chance of snow, mainly by dawn. Lows in the teens.
- Tuesday: Snow likely, ending later in the afternoon. Highs in the 30s.
Follow updates from David Epstein on Twitter @growingwisdom.
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