DULUTH, Minnesota - How cold is it?
In Duluth, Minnesota, it was so cold on Sunday they were freezing their pants off.
Meteorologists at the National Weather Service shared photos of pants they had frozen stiff.
"This pair of pants has froze solid and is standing by itself! 630 AM temperature is -25 degrees," they wrote on Twitter.
The cold snap bracing the Upper Midwest is expected to last for several more days.
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Saturday morning forecast for Chicagoland on February 7th
Mark Strehl has your weather update!