National Weather Service United States Department of Commerce

The severe weather outlook for Sunday presents an enhanced risk of severe weather south of the I-44 corridor in Missouri and along and south of the I-70 corridor in Missouri. A line of severe thunderstorms is expected along a strong cold front, bringing damaging winds and much colder air into the region.
A strong cold front will bring strong to severe thunderstorms, gusty winds, and a brutal drop in temperatures followed by light snow Sunday into Monday.
Strong winds will couple with arctic air to result in wind chills ranging from -10 degrees in northeast Missouri to around 10 degrees across southeast Missouri and southwest Illinois Monday morning. If you put away the winter clothes, you'll need to pull them back out!