A storm riding the edge of incoming polar air could bring the D.C. region a meaningful snowfall Sunday, but the exact track will determine whether the region sees a decent storm or misses out entirely.

After this weekend's snow storm moves out, cold Arctic air will move in.

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

Another polar vortex is expected to bring subzero temperatures that will affect more than 40 million Americans in the coming week.

A major snow storm is hitting the Northeast this weekend, but what can you expect near you? See the latest NOAA forecast, inch count, timing, maps.

A Polar vortex has covered the Philadelphia region under a canopy of frigid temperatures, but many people may not realize what a Polar vortex actually is, and the dangers — like frostbite — such weather conditions could cause. And since thousands of ...