Forecasters said another winter blast might hit midweek.
Forecasters had yesterday warned of exceptionally cold air, perhaps the coldest in years. Strong winds were expected to continue into today, reducing visibility, creating drifts and complicating an ongoing cleanup effort.
Matthew Belk of the National Weather Service said exposed skin could start to develop frostbite in "a matter of minutes."
The Arctic cold front already had frozen the upper Midwest.
New Englanders were talking in superlatives for this winter, harshest, most relentless. Boston already had 6 feet of snow before the latest storm.
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The Massachusetts Bay Transportation Authority said it will resume limited service today after the latest snowstorm forced the agency to suspend service again.
The Coast Guard said it rescued an Australian father-son sailing team whose boat lost power and had its sails torn in 60 mph (96.5 kph) winds about 140 miles (225 kilometers) southeast of Nantucket, Massachusetts.
Belk, the weather forecaster, said that after heading out to sea, the storm may turn north and drop a fresh round of snow on the Northeast on Tuesday, though it's unclear how much. "The question is whether it grazes by southern New England on its way out to the North Atlantic," he said.