Groundhog Day: Record Midwest Snow Raises Flash Freeze Threat - NBCNews.com

Snow socked the Northeast again on Monday, crippling major airports and hindering the recovery from the blizzard last week. Forecasters warned that brutal cold would follow, raising the threat of a flash freeze and an icy mess on Tuesday.

In New England, the snow on Monday fell as fast as 3 inches an hour. By early afternoon, Lunenberg, Massachusetts, had more than 13 inches — and that was on top of what still had to be cleared from the blizzard.

New York got a mix of snow and freezing rain, complicating the commute. The Federal Aviation Administration briefly stopped flights from landing at LaGuardia Airport.

In all, more than 3,400 flights were canceled across the country. That included half the flights scheduled to take off and land at Newark Liberty International Airport in New Jersey.

Forecasters said temperatures would take a deep drive on Monday night. By 7 a.m. Tuesday, The Weather Channel called for readings of 18 degrees in Philadelphia, 14 in New York, 5 in Boston and 4 below zero in Burlington, Vermont.

The winter storm had already caused huge problems in the Midwest.

Chicago O'Hare reported 19.3 inches of snow from the storm, making it the fifth-heaviest on record there. Detroit reported 16.7 inches, the third-highest on record and the most since 1974. Detroit and Milwaukee both set single-day snowfall records on Sunday.

Two people were killed in storm-related car crashes in Nebraska on Sunday, the state patrol said. And three of the four southbound lanes of I-294 in Chicago were closed after a crash involving several cars tractor-trailers, NBC Chicago reported.

New York is expecting 3 to 5 inches of snow by the end of Monday, while Boston should see 8 to 12, said Kevin Roth, a forecaster for The Weather Channel, but the totals were hard to predict.

"It's a bit like the issue we had last week with New York City being right on the fence about how much snowfall they will get as opposed to just rain," Roth said. "Only this time the city on the fence is Boston."

Scott Olson / Getty Images

Pedestrian and motorists navigate a snow-covered street in Chicago on Sunday.

In Chicago, more than 350 city vehicles were out trying to clear main roads, officials said, including more than 150 pieces of heavy equipment "that will focus on clearing streets and removing snow piles resulting from plowing, and addressing snow around vital public safety sites like hospitals, police and fire stations, and schools."

— Alastair Jamieson and Erin McClam

NBC News' Elisha Fieldstadt and Kyle Scott contributed to this report.

First published February 2 2015, 2:03 AM

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