It has been a much cooler day compared to Monday and Tuesday across the Stateline, but the humidity remains high with dew points in the 70s. This will remain the case as a pair of cold fronts pass through, bringing a cooler holiday weekend.
The first of which will slide through Thursday night bringing a chance for some storms along the leading edge of the cold front. A line of gusty storms may form well Northwest of us, with an isolated chance for some strong to severe storms, mainly North and West of Rockford where a Level 1/5 Marginal Risk from the SPC lies.
By Friday morning, most of the storm activity will have been shifted South and East of Rockford, but a few showers and isolated storm may linger into mid-day. The severe threat also shifts well Southeast, mainly focused on Central Illinois into Indiana where another Level 1/5 Marginal risk is set up.
Heading into the holiday weekend, that cold front will begin to drop our temperatures down, with afternoon highs in the low 80s Saturday and then 70s Sunday and Monday. Meanwhile, the entire holiday weekend looks dry as well, with increasingly comfortable air settling in.
Regarding any holiday travel, Thursday night into Friday looks to be the main window for any showers and storms locally, with that threat shifting well South and East by Saturday and Sunday. A much cooler and drier air mass will then settle in by Monday and Tuesday.
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