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From Minneapolis to New York City, nation faces frigid New Year's Eve and start to 2018

Ice clings to the mask of a construction worker, who wasn't working Friday, Dec. 9, 2016, after riding his bicycle almost 9 miles from south Fargo to downtown in the single-digit temperatures. Dave Wallis / The Forum

Relentless and punishing, repeated blasts of cold air will continue surging into the Lower 48 through the first week of the New Year. Only the western United States will be spared.

This cold is likely to be the nation's most extreme since February 2015 and, over a long duration, will produce dangerously low temperatures and wind chills over large portions of both the central and eastern United States.

Temperature some 15 to 30 degrees lower than normal will grip much of the eastern two-thirds of the nation up to seven to 10 more days. Some parts of the north central United States could see temperatures an astonishing 40 to 50 degrees colder than normal this weekend.

On the morning of New Year's Day, the National Weather Service predicts the nation's average low temperature to hover around 10 degrees, with about a third of locations below zero.

These temperatures, compared to normal, will be the coldest in the world.

The bitter chill first arrived around Christmas Eve and has only dug in, becoming more frigid over time, breaking records from the Upper Midwest to the Northeast:

Chicago's high temperature on Tuesday of 5 degrees tied the record for the coldest maximum temperature on Dec. 26.

Detroit tied the daily record low for Dec. 27 of minus-4 Wednesday, previously set in 1925.

International Falls, the so-called icebox of the nation, plummeted to minus-36 Wednesday, breaking the previous record of minus-32 for the date. Its high the previous day was only minus-12, tying the coldest maximum temperature on record for Dec. 26.

Flint, Mich. set an all-time Dec. record low Thursday falling to minus-17.

Watertown, N.Y. shattered Thursday's previous record low of minus-23, falling to minus-32. Glens Falls, N.Y. also set a record low of minus-20.

A few small towns in northern Minnesota were as cold as minus-40 degrees Wednesday morning. Mount Washington, N.H. saw its wind chill plunge to minus-88 on Thursday morning.

As this cold air spilled over the Great Lakes, it generated incredible snowfall, including 65 inches in Erie, shattering the Pennsylvania two-day snowfall record, and up to 62 inches in Oswego County, N.Y.

The piercing cold over the Upper Midwest and Great Lakes is pouring into the Northeast, where the National Weather Service predicts record-cold high temperatures Thursday. Highs are only expected to reach 10 to 15 degrees in Boston, about 20 in New York and 25 in Washington.

The final week of the year in Boston is shaping up to be about the coldest in recorded history.

The pinnacle of this unforgiving cold snap is likely to occur between this weekend and the first few days of the New Year, progressing from the Dakotas to the Northeast. On Saturday, some parts of eastern Montana, the Dakotas and northern Minnesota may see air temperatures crash to minus-40 degrees, and wind chills to minus-50 or lower. High temperatures may not exceed minus-10 Saturday, which would threaten some records.

On Saturday and Sunday, Minneapolis is forecast to have highs of only about minus-5, with lows near minus-15. Wind chills will be considerably lower, as cold as minus-30. Chicago may see its highs stuck in the single digits both Saturday and New Year's Day.

In the East, 2018 may start off even colder than the close of 2017. The American and European model predict New York City will ring in the New Year with an air temperature near 10 degrees and wind chills of zero to minus-5. This would rank among the coldest ball drops in the Big Apple in recorded history. The last time it was so cold was in 1962; 1917 marked the coldest ball drop, when the air temperature was a mere 1 degree.

Subzero wind chills are likely to cover enormous territory New Year's Day - extending as far as south as Oklahoma, Arkansas and the central Appalachians.

Just how cold will your city be? Here is the European modeling system's (ensemble mean) forecast for the coldest day between Dec. 30 and Jan. 2:

Minneapolis: Sunday. High: Minus-4, low: minus-16

Milwaukee: Monday. High: 8, low: minus-2

St. Louis: Monday. High: 14, low: 0

Oklahoma City: Monday. High: 23, low: 12

Dallas: Monday. High: 31, low: 23

Chicago: Monday. High: 5, low: minus-10

Detroit: Sunday and Monday. High: 10, low: minus-9

Cleveland: Monday. High: 9, low: 0

Indianapolis: Monday. High: 5, low: minus-9

Memphis: Monday. High: 26, low: 14

Boston: Monday. High: 9, low: minus-2

New York: Monday. High: 17, low: 5

Pittsburgh: Monday. High: 15, low: 2

Washington: Monday. High: 22, low: 12

Raleigh, N.C.: Tuesday. High: 28, low: 19

Atlanta: Tuesday. High: 33, low: 20

Note that while we are confident it will be extremely cold, forecasts are likely to change some over the coming days. Models have tended to predict somewhat colder temperatures than reality this year at long lead times. But even if these predicted temperatures are a little colder than what actually materializes, it will still be bone-chilling cold.

As the first week of the New Year progresses, temperatures are forecast to remain well below normal in the central and eastern United States. Some new model information suggests the most extreme Arctic blast yet could arrive Wednesday and Thursday (Jan. 4-5) before the cold finally starts to ease around January 8 or 9.

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