It has been quite the "cool" stretch lately in the Stateline, with much of the last month lacking the heat and humidity we are typically accustomed to most summers. The last time the temperature reached 90° in Rockford was June 25th, more than a month ago! We haven't even seen the mid-80s in about a week and a half.
But that stretch of cooler-than-average highs ends tomorrow with afternoon highs likely reaching the mid-80s under plentiful sunshine once again alongside a gradual increase in cloud cover through the evening.
The cloud cover will be the precursor to our next rain chances that will enter the region Sunday morning. This weather system will bring widespread cloud cover and spotty showers, along with a couple embedded thunderstorms. Soaking showers will be possible, but they will be scattered. It will not be a washout by any means, but multiple waves of showers will be possible through the evening.
Looking ahead into next week, an active pattern aloft will develop with persistent flow out of the West Northwest. This will funnel multiple disturbances our way through the week, increasing our storm chances. Our proximity to a developing ridge of high pressure will also bring some heat and humidity back into the region, including our next shot at seeing 90° again. The combination of the warm and humid airmass along with the active flow aloft will bring periodic storms our way through next week.
We have one more sunny and warm day before humidity and storm chances increase starting Sunday. Higher potential for strong storms appears to be on Monday and Wednesday as of now, but there is still plenty of time for this to shift as ingredients become clearer. Afternoon highs and overnight lows will also climb into mid-week, reaching the upper 80s and near 70-degrees, respectively.
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