Hail in Oliver County, North Dakota

Thunderstorms developed initially over western North Dakota during the afternoon and early evening hours before also forming over central North Dakota later in the evening. This as an upper level short wave trough approached the area and a frontal boundary moved in from Montana. The first storm to develop was over Dunn County and quickly produced a tornado. The tornado occurred over an open field south of Manning and impacted no structures. There was no damage to evaluate, therefore it was rated EF-U (Unknown) by NWS policy. Thereafter, the main threat with the thunderstorms was large hail. The largest reported hail was the size of a baseball, and also occurred in Dunn County. There were also reports of severe wind gusts, particularly towards the end of the event with the later storms. With that said, the strongest wind gust did occur during the middle of the event near Plaza, Mountrail County, where estimated 75 mph wind gusts cause tree damage.