Forum staff reports, Published July 24 2013
Weather Service tags Mahnomen tornado as EF2
According to information on the Weather Service’s Grand Forks, N.D., website:
The tornado was on the ground for about 18 miles with intermittent gaps.
The width of the tornado’s path varied from 20 yards to 150 yards and the tornado lasted from about 1:50 a.m. until about 2:30 a.m.
The tornado damaged structures at three locations.
A house and numerous trees were damaged about seven miles southeast of Mahnomen.
About 10 miles southeast of Mahnomen, a pole barn was completely destroyed and farm equipment was strewn about.
The third location was at Roy Lake, where the tornado’s path was the widest and many trees and building damage was caused by winds around 100 mph, the Weather Service said.
There were no reports of injuries from the storm.
The Weather Service’s tornado ranking system goes from EF0, with winds speeds of 65-85 mph, to EF5 and wind speeds greater than 200 mph.
An EF2 tornado has wind speeds of 111 mph to 135 mph.