Strong southerly winds bring a big surge in temperatures sending highs into the 70s and 80s for much of the state. Even northern zones see at least 60s this afternoon. 

A line of strong to severe storms will move into western Ohio around 10 pm., then slide eastward through the overnight hours. The threat increases for Columbus around 12-1 a.m., and into Cleveland around 1-2 a.m.

Along this line, the greatest threat will be damaging straight-line winds, but hail and tornadoes are also possible, especially for western Ohio. 

This will also be the start of a very active pattern that brings a flooding threat to Ohio, especially south of I-70, with widespread totals of 4-6" for much of the state through the weekend.