The Old Farmers Almanac has predicted the last frost dates across the U.S. for 2025 -- and some in the Chicago area might be ...

When the polar vortex begins to wobble and allows arctic air to spill south into northern Illinois in January, we usually end ...

CHICAGO (CBS) — A chunk of the polar vortex is present in the Chicago area, bringing the coldest temperatures of the season with dangerous wind chills. The polar vortex is an ever-present ...

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

Flames from gas-fed heaters are melting away snow and ice at railway intersections in Chicago. It helps to keep the trains running with fewer delays. The US deadly cold snap has caused ...

A historic deep freeze in Chicago, Christian Dior exhibition in London, waxwings visiting the United Kingdom and other photographs of the week. The world in pictures from TASS photo gallery ...

The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

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 ...

"The large polar vortex disruption from the second week of March is playing ... where it will feel more like late February in Chicago and New York early next week as highs drop into the 30s and 40s," ...

"The large polar vortex disruption from the second week of ... where it will feel more like late February in Chicago and New York early next week as highs drop into the 30s and 40s," Savona ...