After a very pleasant week dominated by high pressure, we're finally going to see some real activity in the atmosphere. There is a chance for thunderstorms this weekend and part of next week.
So the large high pressure system that brought record heat to the American southwest is now far enough east to bring us some of that heat. Saturday's south wind will bring highs well into the 80s for most of the UP, and low 70s near Lake Michigan. Skies will be mostly sunny early, but become increasingly cloudy with a chance for thunderstorms from the west with an approaching low pressure system.
Saturday night has the greater chance for storms, but it will likely be just isolated storms and showers. Lows will be very mild into the low 60s.
On Sunday, the warmth will subside a bit as winds shift after a passing front out of the west. Highs will be in the 70s to low 80s. Rain and storms are more likely across the UP on Sunday, especially west and central.
Sunday night's lows will fall into the 50s. Skies will be mostly cloudy with continued chances for rain and storms.
The upcoming week will be cooler with highs mainly in the 70s. The next significant chance for rain or storms will be Tuesday and Wednesday.