This geographic location makes it particularly susceptible to polar vortex events. Imagine Wisconsin as a northern sentinel, standing guard against the cold breezes that sweep down from the Arctic.

Another polar vortex to send temperatures plunging across the U.S. next week. Here's how cold it will get. The latest arctic blast will move into the northern Rockies and northern Plains Saturday ...

The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

Following is a transcript of the video. The polar vortex is headed toward the US, expected to bring record-breaking cold to the Northeast, upper Midwest, and Great Lakes by this week. It's so cold ...

It's similar to the polar vortex pattern from the winter that turned ... for some athletes who are preparing for a triathlon in Wisconsin next weekend. If Lake Michigan is too cold, the swimming ...

A satellite image shows the entry of a large area of low pressure, from the Polar Vortex, into the Northern U.S., on Jan. 6, 2014. (Bloomberg) -- High in the atmosphere above the North Pole ...