Eventually, the blob of molten material beneath Canada split in two and the stronger one slowly shifted toward the blob ...

The polar vortex is beginning to stir, signaling the first signs of seasonal change. Here's when to expect the first frost in New Hampshire.

Regarding the ex-polar lands, compound hot-dry extremes prevail due to active land–atmosphere interactions. Specifically, a mid-tropospheric ridge initiates descending motions, creating clear-sky ...

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. When will Wisconsin see its first freeze?

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could ...

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. What does that mean for Vermont?