* WHAT...Sub-freezing temperatures as low as the upper 20s are expected.
* WHERE...Portions of south central Indiana and east central, north central, northwest, and south central Kentucky.
* WHEN...From midnight EST /11 PM CST/ tonight to 10 AM EST /9 AM CST/ Sunday.
* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.