From the ABC 33/40 weather blog.
As the surface low moves to the northeast, colder air will be pulled into Alabama, and the rain should change to snow for a period before ending Saturday night. The primary window for snow flakes seems to be from about 5:00 p.m. until 9:00 p.m. Considering the warm ground and the fast movement of this system, serious accumulation doesn’t seem likely for North-Central Alabama. The best chance of getting some snow on the ground, most likely, will be over the mountains of Northeast Alabama; places like Mentone and around Desoto State Park.