How Climate Change and the Polar Vortex Influenced This Week’s Harsh Winter Storms

Strong winds and heavy snowfall disrupted travel and knocked out power for thousands of Americans. It’s the latest extreme weather influenced by the warming Arctic.

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A person removes snow from their driveway in Draper, Utah, on Feb. 23, 2023. Powerful winter storms lashed the United States on Feb. 22, 2023, with heavy snow snarling travel across wide areas, even as unusual warmth was expected in others. Credit: George Frey/AFP via Getty Images
A person removes snow from their driveway in Draper, Utah, on Feb. 23, 2023. Powerful winter storms lashed the United States on Feb. 22, 2023, with heavy snow snarling travel across wide areas, even as unusual warmth was expected in others. Credit: George Frey/AFP via Getty Images

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Much of the United States is being battered by bizarre winter weather this week, which trapped snowbound drivers in their cars, prompted airlines to cancel thousands of flights and knocked out power for at least one million properties across the country. It’s the latest disruption to the planet’s typical winter weather patterns caused by a teetering of the northern polar vortex—something researchers say is happening more frequently in part because of global warming.

That’s because the Arctic is warming some four times faster than the rest of the Earth, which destabilizes a fast, high-altitude current of air called the jet stream. That current encircles the Arctic, essentially containing the frigid air in that region and preventing it from creeping down into lower latitudes, including most of the United States. When the jet stream weakens, its pathway can wobble, much like a spinning top losing momentum, and pockets of cold Siberian air can then break out and scramble weather patterns in unpredictable and radical ways.

The swirling mass of freezing air that hangs above the North Pole is known as the polar vortex. Another polar vortex spins above Antarctica. And while disruptions to the northern polar vortex occur somewhat regularly—two out of every three winters on average, with many occurrences yielding mild consequences—some researchers have linked climate change to more extreme and persistent swings in the jet stream. 

“Not everybody agrees with us. It’s still contested science, but I am confident that we’ll see more and more examples of these stretching events in the stratosphere followed shortly after by cold snaps in the midlatitudes as the Arctic climate warms and changes,” Judah Cohen, an atmospheric scientist who published a 2021 study that found polar vortex events have become more common since 1980, told SciTechDaily last month. “The stretching of the polar vortex we saw in December 2022 definitely fits that pattern.”

Polar Vortex Explained

In 2021, a disruption to the polar vortex catapulted bitter Arctic air deep into the central U.S., causing a deadly blackout in Texas when subzero temperatures crippled the natural gas power plants that fed the state’s electrical grid. A similar cold snap, dubbed “the Beast from the East,” occurred in 2018, sending pockets of freezing air into lower latitudes of the U.S. and Europe.

This week, the disruption appears to be playing out in two ways. While the U.S. is being pummeled by strong winter storms, the North Pole’s mass of cold air is now wobbling toward Europe, where temperatures are expected to drop as low as 14 degrees Fahrenheit in early March.

The location and strength of the Northern Hemisphere stratospheric polar vortex on January 4, 11, 18, and 25, and February 1, 8, and 15, 2023. A disruption caused the vortex to shift southward from the pole toward Europe. Lower heights indicate low pressure (and colder temperatures). NOAA animation, based on GFS data from Laura Ciasto. Credit: NOAA

The U.S. storms, which began in some places as early as Tuesday night, caused havoc in nearly every part of the country. By Thursday afternoon, more than 930,000 utility customers living across Michigan, Wisconsin, Illinois, California, Oregon, Arizona and New York had lost power, according to a website that tracks outages in real time. Hundreds of thousands of customers remained without power as of Friday morning, the website showed. 

The week’s storms prompted Minnesota to shut down its legislature and some schools. They made many of southern Wyoming’s roads “impassable,” according to the state’s transportation department, and prompted officials to close more than 200 miles of highway between Arizona and New Mexico, where wind gusts reached 80 miles per hour. They blanketed the Cascade Mountains with deep snow and strong winds, preventing search and rescue teams from reaching the bodies of three climbers killed in an avalanche over the weekend. And they toppled trees and power lines in California, including one tragic incident Tuesday evening when a redwood crashed into a home and critically injured a 1-year-old child.

In fact, Los Angeles County got its first blizzard since 1989, and San Bernardino County issued its first ever blizzard warning, which stays in effect through Saturday. “Travel will be VERY DIFFICULT TO IMPOSSIBLE due to the extremely heavy snow and extremely high winds expected,” the San Diego division of the National Weather Service warned in a tweet Thursday.

Storms in the Midwest are now expected to head to the East Coast, forecasters said, possibly bringing harsh conditions and colder temperatures to places like New England, which has seen a particularly mild winter so far.

Scientists are still figuring out all the implications that come with the warming Arctic, including what more frequent disruptions of the polar vortex could mean for places like North America and Europe. As the planet warms, some data suggests that the kind of extreme cold snaps we’re seeing now are becoming less cold, and that winters are generally becoming milder.

Still, experts warn that the shorter-term impacts could still be very dangerous, especially for states that aren’t used to handling harsh and sometimes unpredictable winter storms like the ones we’re seeing this week.

“As we have seen over the past several years, severe winter storms can be dangerous and deadly,” Terran Kirksey, a meteorologist and communications manager for the climate advocacy nonprofit Climate Signals, said in a press release this week. “As climate change continues, although winters are shorter and milder on average, and the number of winter storms will decrease overall, unusual high-impact winter storms and cold air outbreaks may become more of a risk.”

More Top Climate News

Buttigieg Urges Safety Changes After Fiery Ohio Derailment: Transportation Secretary Pete Buttigieg unveiled a package of regulatory reforms this week that aims to improve railroad safety after a fiery train derailment in Ohio earlier this month unleashed toxic fumes and harmful chemicals into nearby communities, Josh Funk reports for the Associated Press. For those concerned about global warming, the climate links to the East Palestine disaster may not be clear at first. But the plastics the train carried are made from oil. And, much like activists who say special interests impede climate action, the controversy surrounding the Ohio debacle also revolves around industry’s outsized influence on policy. “Rail companies have spent millions of dollars to oppose common-sense safety regulations. And it’s worked,” President Joe Biden tweeted this week. “This is more than a train derailment or a toxic waste spill—it’s years of opposition to safety measures coming home to roost.”

Meet the Mushroom That Could One Day Replace Plastic: Fomes fomentarius. That’s the name of a fungus that researchers say could soon replace the plastic in our headphones, the memory foam in our shoes and even the exoskeletons for airplanes, Justine Calma reports for The Verge. A new study published in the journal Science Advances tested the strength and viability of using products made from fomes fomentarius, finding the material could successfully replace a number of plastic products. That could have huge environmental implications, considering plastic waste has become a global crisis. That’s not to mention plastics are made from oil, which as this misleading ad suggests, isn’t something the oil and gas industry wants you to think about.

Biden Considers First Offshore Wind Auction in Gulf of Mexico: The Biden administration said Wednesday that it’s considering the first-ever lease sale for offshore wind energy in the Gulf of Mexico, a key part of a push to deploy 30 gigawatts of offshore wind by 2030 to help fight climate change, Jennifer McDermott reports for the Associated Press. Reaching that much wind power—enough to power 10 million homes—by the end of the decade is critical if President Joe Biden is going to achieve his ambitious goals of slashing U.S. emissions in half in seven years and reaching net zero emissions by 2050. In fact, the United Nations said the world must double carbon-free electricity production by the end of the decade to avoid runway global warming.

Today’s Indicator


If the world’s oil and gas companies spent just that percentage of the industry’s historic windfall profits from last year—or about $100 billion—they could eliminate almost all of their emissions of methane, a powerful greenhouse gas, the International Energy Agency u003ca href=u0022 in a new reportu003c/au003e.

Hot Gossip

If you’re a native Minnesotan like me, you know the story of the 1991 blizzard, which brought a record 28.4 inches of snow to the Twin Cities around Halloween. This week’s blizzard didn’t break that record, as some had predicted, and of course Minnesotans reacted in the most Minnesota way possible: disappointment. IYKYK.

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