UPDATE: The coldest air of the season is sliding into the Tennessee Valley. A Freeze Warning has been issued for the entire area. Lows will drop into the low 30's in the city and into the mid to upper 20's in many outlying areas.

So protect the tender vegetation or kiss it goodbye!

Skies will clear overnight with a north wind at 10 to 15 mph. Sunshine will be abundant on Friday with highs in the mid 50's and a north wind continuing. Frost will form Friday night as the winds die down and lows drop into the low 30's again in the city with 20's elsewhere. Saturday will sunny with highs in the upper 50's. More frost is expected Sunday morning as highs stay in the 50's.