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

So last week's snowstorm serves as a reminder that Houston gets cold weather without the polar vortex. Some long-range computer models hint at a potential cool down next week or weekend ...

Parts of Texas are likely to be hit with unusually cold temperatures as a polar vortex looks set to push frigid winds across the country. Some forecast models have suggested lobes of the polar ...

Wintry weather refuses to let go of its grip on Atlantic Canada as another round of snow, freezing rain and rain is on the ...

Fort Wayne faces wind gusts, temperature swings, and a storm threat this Good Friday. Here's what to expect heading into Easter weekend.

Broader measures of climate, such as the Southern Annual Mode Index—a measure of the strength of the polar vortex surrounding Antarctica ... The values are derived from a climate model based on ...

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

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe. A major ...

An April cold snap is expected to bring unusually cold temperatures to the eastern half of the US next week. The cold snap could impact new spring vegetation and lead to frost in some areas.