* WHAT…Very cold wind chills as low as 30 below zero.
* WHERE…Portions of northwest Iowa, southwest Minnesota, and east
central and southeast South Dakota.
* WHEN…Until 9 AM CST this morning.
* IMPACTS…The dangerously cold wind chills as low as 30 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
Wind chill values can lead to hypothermia with prolonged exposure.