Today's Weather - O'Fallon, IL

Showers and thunderstorms in the evening then partly cloudy with a chance of showers and thunderstorms after midnight. Some thunderstorms may be severe with damaging winds large hail and tornadoes. Some thunderstorms may be severe. Windy with lows in the mid 50s. South winds 20 to 30 mph. Gusts up to 50 mph decreasing to 40 mph after midnight. Chance of rain near 100 percent.