The polar vortex is about to unleash teeth-chattering cold across the US
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The freeze marks an abrupt shift from December 2023, when spring-like temperatures enveloped parts of the country.
PHOTO: AFP
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WASHINGTON – The polar vortex is about to unleash an Arctic chill across much of the United States this weekend, leaving football fans shivering in the Midwest and inflicting subzero temperatures on Iowa voters just before the state’s caucus begins.
An area of cold air around the North Pole, known as the polar vortex because of its counter-clockwise flow, is set to expand and push a frigid blast south. Temperature in Kansas City, Missouri, is expected to drop to minus 21 deg C on Jan 13 as the hometown Chiefs take on the Miami Dolphins in an NFL wild card playoff game, while Iowa City is expected to fall to minus 12.7 deg C.
The freeze marks an abrupt shift from December 2023, when spring-like temperatures enveloped parts of the country. Extreme cold is now expected to boost the demand for fuel to heat homes and businesses, sending natural gas prices soaring the most since July 2022 earlier this week and raising concern about whether power grids will be up to the test.
“It took winter about six weeks to get started, but it’s going to go gangbusters for the next couple of weeks,” said Mr Rob Carolan, owner of Hometown Forecast Services, which provides outlooks for Bloomberg Radio. “This will be the coldest stretch of winter so far from the Plains to Midwest.”
A few pieces of the atmosphere’s machinery have come together to bring intense cold across central Canada and the US. First, the stratosphere above the North Pole warmed a few weeks ago, which disrupted the polar vortex enough to allow it to send arctic air down across Canada, Mr Carolan said.
In North America, the chill is getting supercharged by blocks, or patterns in the atmospheric pressure field that are nearly stationary, across Greenland and eastern Canada that are forcing the polar jet stream south.
“That is having a larger impact than the polar vortex,” said Mr Paul Pastelok, a meteorologist with AccuWeather Inc.
There is also snow across parts of the Great Plains and Midwest, which gives the frigid air flowing into the US a boost. All this could mean some deep cold reaching as far south as Texas. The state’s grid operator is monitoring conditions due to the risk of higher demand and lower power reserves.
Temperatures in Dallas could hit a low of minus 9.4 deg C on Jan 15 and minus 4.4 deg C in Houston on Jan 16, according to Maxar Technologies Inc., a commercial forecaster.
New York and the Northeast won’t be as cold and will experience weather whiplash over the weekend. Another powerful rainstorm is forecast to swing into Manhattan on Jan 12 and temperatures will rise to near 15.6 deg C on Jan 13 as warm winds push north, but by Jan 14 lows will fall below freezing.
While gas prices have jumped on the outlook for the Arctic chill, the heating oil market has remained muted amid ample stockpiles. East Coast retail prices fell below US$4 (S$5.32) a gallon in January for the first time in nearly two years. BLOOMBERG
