…FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING… …FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT FRIDAY… The National Weather Service in Sioux Falls has issued a Freeze Warning, which is in effect from 1 AM to 9 AM CDT Friday. * TEMPERATURE…Widespread low temperatures around freezing this morning, and near or below freezing Friday morning.