I've been looking at the "source" of our the cooler air on the way for Friday and the weekend.
Temperatures up in Saskatchewan, Canada early this morning were in the 40s, the coolest so far this season.
The strong Canadian high that will bring those cooler temperatures our way will drop in behind a cold front that moves through Middle Tennessee overnight Thursday.
By Friday, our winds will be from the north and northeast, lowering temperatures and humidity.
The 7 Day looks pretty awesome for the weekend. We may not see lows in the 40s, BUT we have even dropped the overnight lows into the 50s, even in the city for Saturday and Sunday mornings!