NWS Springfield, MO http://www.crh.noaa.gov/wxstory.php?site=sgf

An unsettled weather pattern will continue across the region late Wednesday into Thursday. A strengthening cold front will begin to move east toward the Ozarks. An area of strong to severe thunderstorms is expected to develop along and ahead of this front, and will push into the region late Wednesday into the early morning hours on Thursday. The chance for strong storms, along with the potential for heavy rainfall, will continue through much of the day on Thursday.