* WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 30 degrees in the Lower Treasure Valley and as low as 28 degrees in the Upper Treasure Valley and Western Magic Valley are expected. * WHERE...Portions of south central and southwest Idaho and southeast Oregon. * WHEN...For the first Freeze Warning, from 4 AM MDT /3 AM PDT/ to 10 AM MDT /9 AM PDT/ Thursday. For the second Freeze Warning, from midnight MDT /11 PM PDT/ Thursday Night to 10 AM MDT /9 AM PDT/ Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.