* 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.