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

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

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

Lakeshore flooding happens when strong winds and waves push water toward the shoreline, causing rapid rises in water levels ...

When you look at the atmosphere over a long period of time, it appears to move like a fluid. And just like a fluid, the atmosphere often moves in waves. When meteorologists are working to determine if ...

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

Are you a fall person or an autumn person? When the leaves start to turn and the air gets crisp, you might hear both “fall” and “autumn” used to describe the season, but which one is correct? They can ...

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