* WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 29 expected. For the second Freeze Warning, sub-freezing temperatures as low as 29 expected. * WHERE...A portion of central Alabama. * WHEN...For the first Freeze Warning, until 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.