Those in Missouri and Kansas should bundle up -- or stay inside -- as a southbound arctic air mass threatens wind chill readings of 20 below zero or colder.
The National Weather Service has posted wind chill advisories for much of Missouri and northeast Kansas from later today through tomorrow morning. Temperatures will fall as the day progresses and are likely to drop below zero by midnight.
Forecasters warn that the arctic front will create wind chill readings of 20 below zero or colder. Minus 20 readings are possible in northeast Kansas and northwest Missouri. The St. Louis area's may hit minus 24.
Parts of the Missouri Ozarks and southeast Kansas are expected to see chill readings in the teens below zero.