Jan 20, 2025 · However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

Jan 21, 2025 · A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as a polar vortex, is forecast to bring subzero temperatures to the ...

Jan 16, 2025 · The polar vortex strength, as measured by the speed of the winds around the 60N latitude circle and 10 hPa pressure level, remains stronger than average, and is currently forecast by most models to return to near-record strong wind speeds into early February.

Mar 5, 2021 · The Arctic polar vortex is a band of strong westerly winds that forms in the stratosphere between about 10 and 30 miles above the North Pole every winter. The winds enclose a large pool of extremely cold air.

2 days ago · The polar vortex during the middle of January 2024 (and much of the 2023-2024 winter season) was often in a weakened and disrupted state. The main west-to-east winds that make up the vortex had weakened and were displaced off the pole, allowing warmer air into the Arctic stratosphere.

Jan 15, 2025 · Follow the evolution of the Polar Vortex and the associated Arctic Blast. Extreme cold conditions will grip Canada and the United States into deep freeze.

Jan 19, 2025 · An invasion of frigid air from the Arctic is sweeping south from the Plains and Ohio Valley Sunday, moving towards the Southeast and East. Threat level: The colder-than-average temperatures threatens public health for those exposed to the wind and cold, and may harm water and power infrastructure from North Dakota to Texas, on eastward.

Jan 15, 2025 · In normal conditions, the polar vortex spins tightly over the Arctic, allowing the polar jet stream—which blows by beneath and south of the polar vortex—to remain fairly smooth.

Jan 16, 2025 · A major cold blast is in store for millions of Americans as a lobe of a polar vortex will bring brutally cold temperatures to nearly every American east of the Rockies.

Jan 2, 2025 · Instead, the stratospheric polar vortex is becoming "stretched" from north to south across the North Pole. Between the lines: The stretched vortex may be setting in motion a complicated board of atmospheric chess pieces that include a strong area of …