A massive winter storm system enveloped a vast stretch of the United States on Thursday, threatening to upend the travel plans of millions of Americans ahead of what could turn out to be one of the coldest Christmas days on record in many cities.
Leading into the holiday weekend, the system is expected to bring blizzard conditions to the Great Lakes region, up to 2 inches of rain followed by a flash freeze on the East Coast, wind gusts of 100km per hour and bitter cold as far south as the Mexican border.
As the storm moves over the Great Lakes, a weather phenomenon known as a bomb cyclone is expected to develop due to “the abrupt deepening of this low pressure system,” the National Weather Service said.
In its wake, the cyclone could spawn snowfalls of a half inch an hour and winds of more than 80kph in the Upper Midwest and interior Northeast, the weather service said.
An accident involving a semi tractor trailer blocked the eastbound lanes in West Des Moines on Thursday. AP
“This will lead to dangerous, to at times impossible, land and air travel leading up to the holiday weekend,” the agency said on its website. Tree damage and power outages seemed likely as well, it said.
More than half of the Lower 48 states, from Washington state to Florida, are under winter weather alerts, including wind chill advisories affecting about 135 million people, said Ashton Robinson Cook, a meteorologist at the weather service’s Weather Prediction Centre.
Travel conditions, already bad in the Great Plains region, will gradually deteriorate in the Midwest and Great Lakes area as the cold front moves east and brings more than a foot of snow with it to some parts, he said.
Snow squalls — a brief burst of moderate to heavy snow and strong wind — are expected from Illinois to Indiana, and could produce whiteout conditions.
“I think when that happens, there’ll be an impact for travel in areas to get the snow and also historical winds,” Robinson Cook said.
Travellers arrive for flights at O'Hare International Airport in Chicago, Illinois. AFP
The American Automobile Association (AAA) estimates 112.7 million people plan to travel 80km or more from home between Dec.23 and Jan.2, an increase of 3.6 million people over last year and closing in on pre-pandemic numbers.
Nearly 2,700 US flights scheduled for Thursday and Friday have been cancelled, including more than 700 departures and arrivals at two major airports in Chicago, according to flight-tracking service FlightAware. Hundreds of flights have been cancelled in Denver.
Many US airlines have waived change fees and fare differences for passengers.
The frigid air mass that had already enveloped northern states was pushing south through central Oklahoma and northwestern Texas, where the mercury is expected to plunge to about -7 Celsius on Thursday. Combined with wind gusts of up to 100kph, wind chills could go as low as minus 40°C.
Temperatures in parts of the Southern Plains and Southeast could stay below freezing — 30-plus degrees less than normal — for multiple days, the weather service predicted.
A man clears a path to vehicles parked in a lot on Thursday in Denver. AP
Greg Carbin, chief of forecast operations at the Weather Prediction Centre, said that freezing or below-freezing temperatures are expected to bisect Florida from Pensacola through Orlando to Daytona Beach. Temperatures could register about 25 degrees below normal.
“That’s pretty darn chilly for Florida,” he said.
Motorists in the Ohio and Tennessee valleys were warned that wet roads could instantly freeze over due to a rapid drop in temperatures.
The weather service also warned of freezing rain in parts of Oregon and Washington in the Northwest, where the storm originated, late on Thursday.
Georgia on Wednesday joined North Carolina and Kentucky in declaring states of emergency. Temperatures in north Georgia were forecast to hit minus 12°C with subzero wind chills.
“We are expecting weather we haven’t seen in a decade or more,” Georgia Governor Brian Kemp said at a media briefing.
US power and natural gas prices in the Midwest and West Coast soared to multiyear highs on Thursday.
Gas output was on track to drop about 4.7 billion cubic feet per day (bcfd) over the past three days to a preliminary seven-month low of 94.3 bcfd on Thursday due to frozen wells in Texas, Oklahoma, North Dakota, Pennsylvania and elsewhere.
Reuters