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Deep freeze grips U.S. as winter ‘bomb cyclone’ looms ahead of holiday weekend

By Steve Gorman
Dec 23 (Reuters) – A deep freeze enveloping most of the United States early on Friday combined with a massive winter storm brewing in the Midwest to leave two-thirds of the nation under extreme weather alerts, confounding travel plans for millions of Americans.
Heading into the Christmas holiday weekend, the looming storm was forecast to develop into a “bomb cyclone,” unleashing heavy, blinding snow from the northern Plains and Great Lakes region to the upper Mississippi Valley and western New York.
Numbing cold intensified by high winds was expected to extend as far south as the U.S.-Mexico border.
Hard-freeze warnings were posted across the Gulf Coast states of Texas, Louisiana, Alabama and Florida, while significant icing was possible from a separate arctic blast hitting the Pacific Northwest.
By late Thursday, most of the Lower 48 states, from Washington state to Florida, were under wind-chill alerts, blizzard warnings or other winter weather advisories affecting more than 200 million people, about 60% of the U.S. population, the National Weather Service (NWS) reported.
The NWS map of existing or impending wintry hazards, stretching from border to border and coast to coast, “depicts one of the greatest extents of winter weather warnings and advisories ever,” the agency said.
The bomb cyclone could unleash snowfalls of a half inch (1.25 cm) per hour driven by gale-force winds, cutting visibility to near zero, the weather service said.
Combined with the arctic cold, wind-chill factors as low as 40 degrees below zero Fahrenheit (minus 40 Celsius) were forecast in the High Plains, the northern Rockies and the Great Basin, the NWS said. Exposure to such conditions without adequate protection can cause frostbite within minutes.
Power outages were expected from high winds, heavy snow and ice, as well as the strain of higher-than-usual energy demands.
One of the greatest immediate impacts, even before the storm fully took shape, was the upending of commercial air traffic during the busy holiday travel period.
More than 5,000 U.S. flights scheduled for Thursday and Friday were canceled, with two major airports in Chicago accounting for nearly 1,300 of the cancellations, according to flight-tracking service FlightAware.
One would-be holiday traveler, Brandon Mattis, 24, said Thursday his flight from New York City to Atlanta was canceled due to the coming storm, leaving him “flustered” at LaGuardia Airport in Queens.
Mattis said he searched for alternate routes and was even considering a 21-hour bus ride to Atlanta. “Anything we can do just to get there, we’re going to do,” he told Reuters.
The American Automobile Association had estimated that 112.7 million people planned to travel 50 miles (80 km) or more from home between Dec. 23 and Jan. 2, up 3.6 million travelers over last year and closing in on pre-pandemic numbers.
But that number was likely to be diminished by air and road travel complicated by treacherous weather leading into the weekend.
Even U.S. President Biden urged Americans to think twice about venturing out after Thursday, calling the gathering storm “dangerous and threatening.”
“This is not like a snow day, when you were a kid, this is serious stuff,” he said in comments at the White House on Thursday.
The extreme cold also posed a particular hazard to livestock in ranching-intensive regions of the country. Tyson Foods Inc , the nation’s leading meat producer by sales, said it had scaled back operations to protect employees and animals.
The weather service said relief from the deep freeze was in sight for the northern Rockies and High Plains, where the arctic blast first materialized on Thursday. Temperatures in parts of those regions could rebound by 40 to 60 degrees over the weekend as the cold air mass creeps farther east. (Writing and reporting by Steve Gorman in Los Angeles; Additional reporting by Tyler Clifford, Rich McKay, Laila Kearney, Lisa Baertlein, Julia Harte, Nandita Bose, Scott DiSavino, Tom Polansek and PJ Huffstutter; Editing by Stephen Coates)
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