Sub-freezing temperatures as low as 25 expected.
Portions of southwest North Carolina, east Tennessee and southwest Virginia.
From 1 AM EDT /midnight CDT/ to 9 AM EDT /8 AM CDT/ Tuesday.
Frost and freeze conditions could kill crops and other sensitive vegetation.
Take steps now to protect tender plants from the cold. Those that have in-ground sprinkler systems should drain them and cover above-ground pipes to protect them from freezing.