An avalanche is a sudden, fast-moving slide of snow down a mountain slope, triggered when weather conditions weaken the ...

Chinook winds are warm, dry downslope winds that can cause temperatures to rise rapidly east of the Rocky Mountains, ...

The Arctic Oscillation is a metric used to describe the strength of the polar vortex, or mass of arctic air that rotates ...

In order for a lenticular cloud to form, you need a somewhat moist and stable airmass. In this case, a stable air mass refers ...

Snowpack is the buildup of winter snow in the mountains that acts as a natural reservoir, supplying much of the western U.S.

What constitutes a “normal” weather day? Turns out there’s a way in which meteorologists calculate that! First Alert ...

Behind the scenes, forecasters have many different tools they use to predict the weather. First Alert Meteorologist Derek ...

Mammatus clouds are some of the most visually striking and unusual cloud formations in the sky. They appear as rounded, pouchlike lobes that hang down from the base of a cloud, usually under ...