Precipitation will begin to push into southern Iowa through the evening hours. Showers and thunderstorms are possible, with some thunderstorms capable of producing heavy rainfall. The precipitation will begin to switch to snow over northwest Iowa late tonight with the transition gradually shifting southeast Thursday, a brief mix of wintry precipitation is possible before rain changes to snow. Winds will be light initially Thursday but will increase significantly by the afternoon. The combination of several inches of snow and wind gusts approaching 50 mph will produce blizzard conditions over portions of northern Iowa.