It was a hot one again today with highs of 91-95 across the viewinga area. Heat index peaked at 104 at Morocco.
Highs tomorrow will run 91-96 with heat indices near 100 to perhaps as high as 104.
Line of storms is evolving Wisconsin to Michigant to Ohio with strengthening low-level jet, thinking this will organize into an MCS overnight. Although derecho status (even low-end) will not be reached heavy rain & scattered severe gusts are possible with it in Michigan to Ohio.
Here, its outflow boundary will pass tomorrow morning with a few pops of isolated showers/storms. A couple more may pop in the afternoon & evening along the same boundary. Coverage will run generally at 20%.
90+, overall, will be with us until Sunday with a peak at 94-99 Sunday.
Cold front will pass Sunday night with a few isolated storms. Monday will cool to 90. A few isolated storm may pop Tuesday with secondary cold front. That will usher in the really nice, cool air. Highs by Wednesday-Thursday will run in the 70s with lows in the 40s.
At least right now, it appears that there is no sign of any widespread, significant rainfall, only isolated storms.