High pressure will control the weather across the eastern Great Lakes through Thursday morning. Low pressure over Texas today, will move into the Mississippi Valley Thursday, then northward into the Great Lakes on Friday.
Clouds will increase across the region on Thursday as the low to the southwest moves closer to the area. Rain showers will arrive in Ohio by Thursday evening, then gradually overspread the entire region from southwest to northeast by Friday morning.
Friday will be a rainy day across much of the region as low pressure moves through the Great Lakes. It will remain mild with a persistent southwesterly flow continuing.
We will probably see a break in the rain showers Friday night and early Saturday as the system moves away. However, this break will be short lived as another system will begin to gather strength across the deep south on Saturday. Rain showers associated with this system will spread northeastward across the region late Saturday, and continue through Sunday and possibly even into Monday.
Once that system moves northeast of the area, much colder air will filter southward across the area by the middle of next week.