It was a pleasant but breezy Mother's Day with high temperatures into the mid-60s and a lot of sunshine. Under a mainly clear sky this evening, temperatures will drop quickly into the low 40s and upper 30s. A light breeze should curtail any widespread frost threat. But where temperatures drop into the mid-30s, at least some patches of frost are possible.
The best chances to see that patchy frost will be North and West of Rockford, where a frost advisory will go into effect between 12-2AM and run through 8AM for Green, Rock, and Walworth Counties in Southern Wisconsin along with Jo Daviess and Stephenson Counties in Northwestern Illinois. Any frost threat will quickly go away as the sun rises with another round of morning sunshine and quickly warming temperatures.
The next impactful weather system will slide through the area on Tuesday, bringing a period of stronger Southwest and West winds along with some scattered showers and a few isolated thunderstorms. Winds could gust upwards of 30-40 mph outside of storms, with a low-end risk of a few severe storms as well.
Behind Tuesday's system, the warming trend will be temporarily slowed with highs in the 60s Wednesday and Thursday. But steady warming brings afternoon highs back to a summer-like feel with nearly 80-degree highs next weekend! That warmer pattern does come with periodic thunderstorm chances which will become more clarified as we get later in the week.
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