National Weather Service United States Department of Commerce

Overview

On the evening of September 21, 2005 a series of supercells produced four tornadoes, widespread wind damage, large hail, and flash-flooding in east central Minnesota. 3 inch hail was reported in Rice Lake (Barron County) Wisconsin while 2.5 inch hail was reported in Andover (Anoka County) Minnesota. Wind gusts of 78 miles per hour were reported in Crystal, Minnesota (Hennepin County) and it is possible that wind gusts reached 100 miles per hour in some areas of Andover. Although four tornadoes occurred, damage was mainly caused by downbursts. For example, most of the tree damage in Maple Grove, Brooklyn Center, Brooklyn Park, and north Minneapolis was due to the rear flank downdraft. There was one fatality in Minneapolis in which a large tree branch fell on the victim.