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Why Is It So Cold?

National Weather Service

In The Moment  ... January 29, 2019 Show 504 Hour 1

"Life threatening" weather is in the forecast over the next couple of days. Air temperatures of almost 40-degrees below zero are predicted for northeast South Dakota and wind chill warnings cover a large part of the state.

Meteorologist Todd Heitkamp joins In The Moment to explain how these weather extremes happen.

Lori Walsh is the host and senior producer of In the Moment.