 Radar Weather is brought to you by Roberts Motors in Alton, home of Quicklane Tire and Auto Center. Open Monday through Friday from 7 a.m. until 6 p.m. for your convenience. Mostly cloudy skies, showers and thunderstorms in the forecast. After an overnight low in the mid-70s, your Saturday should be a partly sunny day with a chance of showers and thunderstorms and a high around 90 degrees.