A blast of frigid air will grip most of the eastern half of the United States into midweek.
The impending polar plunge will rival the frigid days from earlier this January for the coldest daytime highs and nighttime lows so far this winter in parts of the Midwest and interior Northeast.
The arctic air first plunged into the Upper Midwest, northern Plains and northern Rockies on Sunday and continued to press to the Gulf and Atlantic coasts on Tuesday.
The magnitude of this cold blast will be enough to produce a far-reaching threat of frostbite, hypothermia, frozen pipes and water main breaks.
Care should also be taken to ensure that livestock and other animals housed outdoors have adequate shelter.
Especially across the Midwest and Northeast, officials may decide to cancel or delay school due to the extreme cold. Some vehicles may struggle or fail to start.
While highs will be held to the 30s southward to the I-10 corridor, the Midwest and Northeast will experience the harshest conditions.
Temperatures plunged below zero Tuesday morning from central Montana to northern Maine, southward to eastern Colorado, areas along the Ohio River and into the mountains of Pennsylvania, western Maryland and West Virginia.
Across much of the Midwest and the interior Northeast, high temperatures were in the single digits and teens on Tuesday with some areas over the northern tier states remaining below zero.
Temperatures are forecast to rebound over portions of the northern Plains and the Midwest on Wednesday, but they will remain at frigid levels in much of the Northeast and the interior South.
Biting winds will usher in frigid air, creating dramatically lower AccuWeather.com RealFeel® temperatures.
RealFeel® temperatures will be extremely dangerous across eastern North Dakota, Minnesota, Wisconsin and the Upper Peninsula of Michigan. On Sunday night, RealFeel® temperatures dipped to 50 below zero in the town of Wadena, Minn.
Frostbite can develop in a matter of minutes on exposed skin during such intense cold.
Along the leading edge of the invading cold air, an Alberta Clipper spread a few inches of snow from parts of the southern Appalachians to northern New England on Monday.
The invading cold and a developing storm began spreading a swath of snow and ice across the I-10 and I-95 corridors in the South on Tuesday and will continue into Wednesday.
Snow and spotty ice will swing across parts of the central and northern Plains to the Upper Midwest as November ends and December begins.
After the brief shot of chilly air this past weekend, the month of December will start out mild across the Northeast.
December will begin with a roar across the Northwest as rounds of rain, mountain snow and even ice are in store this week.
The reprieve from heavy rain across southern India will not last with the threat for flooding downpours set to return for the final day of November.
Tens of thousands will gather in rainy and mild conditions at 30 Rockefeller Plaza in New York City on Wednesday, Dec. 2, 2015, for the 83rd annual Christmas tree lighting.
Studies show that heart attacks increase in December and January each year.
Eastern Maine (1964)
Down east blizzard 12-18" snow, accompanied by 60 mph winds; 8' drifts. Record snow from Detroit to Pittsburgh: Pittsburgh, PA 8.5" snow, most for date Akron-Canton, OH 24" snowstorm Dec. 1-2 - biggest snowstorm on record Detroit, MI Record 19.2" snow paralyzed city.
Ohio, Ontario (1996)
A line of severe thunder storms moved across the state. In Cleveland, OH there was a 60 mph wind gust. An 18-foot tractor trailer was blown over on I-77 in Richfield, OH. In Guelph, ON a wind gust lifted the roof of a gym, where a church group was playing basketball. Residents of one neighborhood saw a car spinning on its grill like a top.
Erie Canal (1831)
Coldest December ever closed Erie Canal.