There will be a late season surge of mid-summer heat and humidity this week -- Tuesday through Thursday. As a warm front lifted north late Sunday night into Monday morning, widely scattered showers and a few thunderstorms were possible across portions of northern and central Illinois.

While a few showers or storms were not being ruled out Tuesday through Thursday afternoon, more widespread coverage of showers and at least scattered storms are probable Thursday night with a cold front passage.
Tuesday thru Thursday high temps are expected in the mid to upper 80s, some readings could reach the 90s.

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