Much of the week ahead will be characterized by cooler, more refreshing weather. Heat and humidity are a combination not seen in the immediate forecast, keeping afternoon highs in the 70s for the next several days. Overnights will be downright refreshing, with most low temperatures in the mid 50s or cooler!
But that pattern does not come without rain and storm chances. Our first potential arrives with a quick-moving wave to the North early in the day Tuesday. This will produce some isolated to widely scattered showers and a few thunderstorms. Our severe weather looks very limited locally, but a storm or two may perk up and produce some strong winds or large hail across far Eastern Illinois into Indiana. The Storm Prediction Center has a Level 1/5 Marginal risk in place for areas South and East of the Stateline. Much of the day will be dry locally over toward Northern Illinois.
A more potent and dynamic system will arrive Wednesday. This storm threat will be much broader with better ingredients for severe weather across much of the mid-Mississippi Valley into the Great Lakes. Multiple waves of showers and storms will be possible, with some storms strong to severe.
The highest confidence of severe weather looks to be centered South of Northern Illinois with limited moisture and instability this far North. Dynamic systems like this have a tendency to make up for limited ingredients, so a few severe storms may still be possible locally. Exact timing will depend on the track of our surface low pressure. But for now, keep tuned as the forecast will likely evolve as we get closer to the event!
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