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

The Polar Vortex in the upper atmosphere has disintegrated after the intense warming of the stratosphere in mid-March.

The pattern responsible for severe weather and flash flooding in the central United States will ease in the week ahead - but at a price. Winterlike conditions will return to a large part of the ...

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