Chance of showers, few thunderstorms overnight with gradual clearing west Monday afternoon Weather Updates from TV6 Meteorologists Karl Bohnak and Jennifer Perez A frontal system from Ontario enters Lake Superior and the Western Upper Peninsula overnight, bringing the chance for rain showers and thunderstorms in the Western U.P. then increasing in coverage and spreading eastward towards Monday morning. Thunderstorms are capable of producing damaging wind gusts, hail and brief downpour. Showers and thunderstorms diminish west by Monday midday, with few to isolated coverage over the central and eastern counties in the afternoon as the system exits the U.P.