When the polar vortex stretches, North America feels the chill. New research reveals some of the stratospheric patterns controlling these cold snaps.

Even in a warming climate, brutal cold snaps still hammer parts of the U.S., and a new study uncovers why. High above the ...

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A new study warns that future nor’easters could unleash more snow, stronger winds, and historic damage across the U.S. East ...

Judah Cohen, seasonal forecast director at the private firm Atmospheric and Environmental Research, called this a polar vortex event. He and DePodwin called it a stretching of the polar vortex, ...

It's moving west and will push the jet stream — the river of air that moves weather systems such as storms — into a pattern that causes polar air to plunge and stay there, Cohen said.

It's moving west and will push the jet stream — the river of air that moves weather systems such as storms — into a pattern that causes polar air to plunge and stay there, Cohen said.

These polar vortex stretches are happening more frequently as the world — and especially the Arctic — warms, a 2021 paper published in the journal Science, also co-authored by Cohen, demonstrated.

“This would be one of the coldest outbreaks certainly of the past 10 years, 15 years,” said winter weather expert Judah Cohen of Atmospheric Environmental Research. “It’s pulling air out ...

It's moving west and will push the jet stream — the river of air that moves weather systems such as storms — into a pattern that causes polar air to plunge and stay there, Cohen said.

FILE - The Peace Monument, also known as the Naval Monument or Civil War Sailors Monument, is covered with snow outside the Capitol, Feb. 12, 2025, after a snowstorm in Washington.

(Robert Cohen/St. Louis Post-Dispatch via AP, File) FILE – The Peace Monument, also known as the Naval Monument or Civil War Sailors Monument, is covered with snow outside the Capitol, Feb. 12 ...