* WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 31 possible. * WHERE...De Kalb, Lagrange, Noble, Northern Kosciusko, Southern Kosciusko, Steuben, and Whitley Counties. * WHEN...For the Frost Advisory, from 4 AM to 9 AM EDT Saturday. For the Freeze Watch, from late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. Take steps now to protect tender plants from the cold.