* WHAT...Sub-freezing temperatures in the upper 20s and lower 30s expected.
* WHERE...Portions of East Central and Southeast Indiana, Northeast and Northern Kentucky, and Central, South Central, Southwest, and West Central Ohio.
* WHEN...From 1 AM to 9 AM EDT Sunday.
* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.