A lobe of the Polar Vortex is going to swing through Ontario just north of Michigan. The upper-air forecast gives us an easy look at this strong winter player. The general meaning of the Polar ...

Arctic winds from a powerful polar vortex are sweeping across several states ... According to the Windy weather map, temperatures are currently freezing or below in most of the United States ...

Icy conditions are expected to affect a swathe of the country for weeks. The polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip yesterday.

In short, the answer is the polar vortex. But what does that mean? The polar vortex is a “constant feature” that begins to develop sometime in September and persist through sometime in spring ...

A polar vortex, a weather pattern similar to the historic winter storm that struck Texas in 2021 — when every county in the state experienced below-freezing temperatures for the first time ...