Minor Expected Likely Frost Advisory Frost Advisory issued May 10 at 3:37AM CDT until May 10 at 9:00AM CDT by NWS Grand Forks ND May 10, 3:37 AM → May 10, 9:00 AM WHAT: Temperatures as low as 33 will result in frost formation. WHERE: In Minnesota, Wadena, Clay, East Otter Tail, Grant, WestOtter Tail, and Wilkin Counties. In North Dakota, Cass, Ransom,Richland, and Sargent Counties. WHEN: Until 9 AM CDT this morning. IMPACTS: Frost could harm sensitive outdoor vegetation. Sensitiveoutdoor plants may be killed if left uncovered. + Read More Take steps now to protect tender plants from the cold. Updated: May 10, 4:40 AM Source: NWS Alert