* WHAT...Very cold wind chills as low as 26 below expected.

* WHERE...Portions of southwest and west central Iowa and east central, northeast, and southeast Nebraska.

* WHEN...From midnight tonight to noon CST Tuesday.

* IMPACTS...The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 30 minutes. Prolonged exposure to these wind chills without proper clothing will result in hypothermia.