Thunderstorm Wind in Clearwater County, Minnesota

Ground survey and high resolution satellite confirmed a long swath of widespread destructive straight-line winds estimated between 80 and 90 mph starting across south central Clearwater County north of Highway 200 and south of Highway 2. The swath was 8 miles at its widest and easternmost point in Clearwater County. This surge of straight-line winds continued east into southern Beltrami and northern Hubbard counties where more significant winds and impacts were observed around Bemidji. The 30 mile long swath started in Clearwater County and ended near the southeastern Beltrami county line. There was approximately 60,388 acres of Clearwater County impacted with widespread tree damage within this single swath.

During the evening of Friday, June 20th into the early morning hours of June 21st, much of the region was affected by severe weather. A powerful line of severe thunderstorms categorized as a derecho, which tracked across much of the region, including northwest Minnesota, brought widespread straight line wind damage. After the derecho passed through the region, there was a period of prolonged destructive winds that affected portions of central and east central North Dakota, as well as adjacent portions of Minnesota. This was a unique event due to the long duration of significant winds that followed the derecho.