* WHAT...clear skies will allow temperatures to fall into the low to mid 30s overnight. This will lead to widespread frost in many locations early this morning with a few places briefly falling below freezing. * WHERE...Portions of east central, northeast, south central, and southeast Kentucky. * WHEN...Until 10 AM EST this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.