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

April 5, 2025 - By Laura Ciasto and Amy Butler - After spending much of the season with super strong wind speeds, the polar ...

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

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

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

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

Sustained warm weather has been elusive this spring. When will we feel a change? Lee Goldberg explain in the latest edition of "Weather or Not." ...

A significant disruption to the polar vortex over far Northern Canada will keep the pattern’s influence locked in our neck of the woods like a houseguest overstaying their welcome. Even as the world ...

It’s tough to trudge through a Canadian winter without hearing about the polar vortex, that circulation surrounding the Arctic that occasionally sends bouts of frigid temperatures surging southward.

Don't put away those winter coats just yet. An April cold snap is forecast for much of the eastern half of the U.S. early next week, forecasters said, with freezes likely across portions of the ...