* WHAT...For this morning's Freeze Warning, the Warning has been cancelled due to temperatures warming above freezing. For Wednesday's Freeze Warning, sub-freezing temperatures as low as 22 expected. * WHERE...Central Yampa River Basin and Lower Yampa River Basin. * WHEN...From 1 AM to 9 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.