Several days with temperatures of 10-20 degrees below the historical average could be dangerous to plants and ruin outdoor ...

NOAA weather models predict Wednesday lows below zero in Oklahoma, Colorado, Nebraska ... Obviously this isn’t the first polar vortex episode of the winter, but it looks to be the most severe.” ...

It appears in September, when a seasonal lack of sunlight begins to make it cooler inside the Arctic region than outside, ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

A polar vortex collapse is set to send the mercury plunging as "extreme conditions" sweep across the US and Canada. The meteorological switch-up is set to develop by the middle of the month and ...

A polar vortex collapse has been forecast to hit within weeks. The weather phenomenon will hit in mid-March and will affect the United States and Canada predominantly. It will be the second ...

"The large polar vortex disruption from the second week of March is playing a key role in next week’s eastern US cold snap," meteorologist Judah Cohen of Atmospheric and Environmental Research told ...