MINNEAPOLIS — Some of the coldest air of the season has settled into Minnesota.

The bottom dropped out of readings in the northern region of the state Thursday. It’s 31 below in Ely and Fosston, 28 below at Bemidji and 25 below in Brainerd. That’s without the wind chill factor.

The National Weather Service issued a wind chill advisory for parts of Minnesota.

Overnight, Austin’s wind chill reached minus 24.