* WHAT...Sub-freezing temperatures as low as 26 across Northern Alabama.
* WHERE...Portions of north central, northeast, and northwest Alabama.
* WHEN...For the first Freeze Warning, from midnight tonight to 8 AM CST Saturday. For the second Freeze Warning, from midnight Saturday Night to 8 AM CST Sunday.
* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.