A winter chill will plunge into as a blast of arctic air will kick off December. FOX Weather Meteorologist forecast the cold front that will travel east across US affecting millions of Americans with some of the coldest temperatures of the season.
Arctic air is sweeping the nation just in time for the start of meteorological winter, causing over 235 million Americans to experience below freezing temperatures through the end of the week.
Monday is set to be the coldest day of the arctic air outbreak, where temperatures will be subzero across Montana, the Dakotas, Wyoming, Minnesota and Wisconsin.
COAST-TO-COAST STORM KICKS OFF DECEMBER WITH MAJOR IMPACTS FROM HEAVY SNOW TO ICE
Cold Weather Advisors are in effect for northern Montana since the wind chill will cause it to feel 20 to 30 degrees below zero while Chicago, Milwaukee and Des Moines may wake up to single-digit temperatures. Those cities’ temperatures are not expected to climb above zero at any point this week.
People bundled up walk on a street in Chicago, the United States, on Feb. 18, 2025. Despite the sunshine, it is likely the coldest day of this week in Chicago on Tuesday, with the highest temperature being minus 23.9 Celsius degrees and the lowest plunging to minus 28.3 Celsius degrees. The wind chill is at minus 31.6 Celsius degrees.
((Photo by Vincent D. Johnson/Xinhua via Getty Images) / Getty Images)
The bitterly cold air is also expected to reach as far south as the lower Mississippi River Valley, which may lead to a minor ice event.
According to the FOX Forecast Center, the arctic blast dropped into the Mountain West from Canada due to a dip in the jet stream on Saturday, and continued to spread the cold air across the south and east throughout the weekend.
WHAT IS THE POLAR VORTEX?
On top of the arctic blast, millions of Americans are enduring two powerful winter storms. One record storm over the Thanksgiving holiday weekend which slammed the Midwest with up to a foot of snow.
Meanwhile, the other cross-country storm moved out of Canada into the Rockies on Sunday, which will cause even more snow due to the arctic blast temperatures as it charges east.
Many areas will continue to experience below freezing temperatures on Tuesday and Wednesday with the coldest air lingering over the High Plains and Upper Midwest.
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By Thursday and Friday, a cold front will move through the nation, ushering in another surge of arctic air. This push of freezing air will make conditions even colder, setting the stage for potentially record-breaking lows in the morning.
WEST DES MOINES, IOWA – JANUARY 13: Motorists navigate through blowing snow during a cold windy day on January 13, 2024 in West Des Moines, Iowa.
(Scott Olson / Getty Images)
The cold blast will impact the Midwest on Thursday, creating below zero morning temperatures in the Dakotas, Minnesota, Wisconsin and Iowa.
(FOX Weather)
By Friday, the cold will expand from the Midwest all the way to the I-95 corridor, causing record low temperatures in the morning, affecting Pittsburgh, New York, Indianapolis, and Baltimore.
Morning temperatures are expected to be in the single digits across the Midwest and Great Lakes while the I-95 corridor will see temperatures in the upper teens to lower 20s.
(FOX Weather)
Experts say that these temperatures are more typical for early February than December, which validates the forecasts from early November that predicted a cold and snowy start to the winter due to a weakening in the Polar Vortex and the emergence of the La Niña climate pattern.
FILE – People walk in freezing cold temperatures on February 4, 2023 in New York City, where temperatures were expected to reach a high of 27F (-3C). – The northeastern US and Canada are experiencing an Arctic blast that could see some areas record their lowest ever wind chill temperatures. The US National Weather Service (NWS) warned that parts of Maine might see wind chills of minus 60 degrees Fahrenheit (minus 51 degrees Celsius). “This is an epic, generational arctic outbreak,” the NWS office in Caribou, near Maine’s border with Canada, wrote in an advisory. (Photo by ANGELA WEISS / AFP) (Photo by ANGELA WEISS/AFP via Getty Images)
(Getty Images)
According to Aaaaa’s Climate Prediction Center, the cold and snow conditions will remain for most of the first half of this month.
