US EditionPolar Vortex, Much Colder Temperatures On The Way After Thanksgiving
A weakening polar vortex could cause a sharp temperature drop and increased snow chances after Thanksgiving, with over 30% likelihood of below-normal temperatures in Illinois.
- On Nov. 24, the forecast shows a polar vortex disruption may weaken, bringing colder, possibly snowier weather to the United States and a colder start to December in the Chicago area.
- Zonal winds aloft are declining toward 0 m/s, potentially triggering SSW that weakens the vortex, with Dr. Furtado noting `With North America, we have a weak La Nina and other patterns in the Pacific that have a direct influence on the weather as well.`
- The National Weather Service in Duluth ran 30 models that showed moderate-to-high confidence in a cold front bringing temperatures from near 50 to the 30s for Thanksgiving weekend.
- AccuWeather warns dangerous wind gusts could disrupt Thanksgiving parades and increase heavy snow risk along the Great Lakes.
- Forecasters caution the timing is unusually early with few past analogs, as NOAA's Climate Prediction Center favors below-average U.S. temperatures from Nov. 29-Dec. 12.
25 Articles
25 Articles
Cold and snowy weather could be coming for many, thanks to the polar vortex
John Normile/Getty Images (NEW YORK) — A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across portions of the United States. It’s all thanks to a disruption in the polar vortex. Here’s what you need to know. Why is this happening? Our atmosphere consists of many layers of moving air; the troposphere is where our weather happens and above it is the stratosphere. Over both poles, a …
Cold and snowy weather could be coming for many, thanks to the polar vortex
John Normile/Getty Images (NEW YORK) — A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across portions of the United States. It’s all thanks to a disruption in the polar vortex. Here’s what you need to know. Why is this happening? Our atmosphere consists of many layers of moving air; the troposphere is where our weather happens and above it is the stratosphere. Over both poles, a …
Winter weather possible for Thanksgiving week
BRAINERD — There’s a good chance winter weather will be making a late fall appearance Thanksgiving week across northern Minnesota, including in the Brainerd lakes area. The National Weather Service in Duluth noted there is increasing confidence a weather pattern change is likely to begin at the end of November and into early December. The outlook for Nov. 24-30 calls for high daily temperatures retreating to closer to normal, which is in the low…
Weather Will Turn To 'Persistent Winter Pattern' Next Week
CHICAGO — Warmer temperatures that have spoiled Chicagoans into late November will have their last gasps before Thanksgiving. “It’s time to wrap up anything you need to do outside on the warm weather side,” said Todd Kluber, a National Weather Service meteorologist. “It’s coming to the end.” Temperatures will hang around 50 degrees through Wednesday before a cool-down plunges the city into the 30s, Kluber said. Besides a “cold shot” that brought…
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