Thunderstorm Wind in Koochiching County, Minnesota

An eighteen inch diameter poplar tree was blown over and blocking a road. There were also several other poplar trees with tops blown off that measured six to eight inches in diameter.

A warm front lifted across the Northland during the early morning hours of the 20th bringing an unusually warm and moist airmass to the region creating very unstable conditions by the afternoon hours. During the late evening hours, a very strong low level jet ramped up and led to the development of storms across central Minnesota that moved to the northeast. Additional storms developed on the backside of the initial wave with the severe storm potential tapering off just before midnight. The storms primarily produced tree damage as they worked across the region, but there was some marginally severe hail as well.