An upper level low will move slowly eastward across Tennessee this weekend.
After a soggy Friday, rain chances will still be around on Saturday but it shouldn't rain all day long, though a shower or t'shower could occur any time of the day.
By Sunday afternoon, the low should have moved far enough east to where showers will become more isolated in nature (though still a 20% chance). It will warm to the mid to upper 80s in the humidity by then.
We could see 90 by Monday and Tuesday of next week!