…Updated information regarding the 22 November 2010 tornado in Winnebago, Boone, and McHenry Counties…
On Tuesday a team from the National Weather Service office in Romeoville performed an onsite survey of the damage resulting from Monday’s tornado. Preliminary results of the survey were released Tuesday afternoon. Based on additional information reviewed after the survey…including photos, videos, and reports from eye witnesses…plus a more detailed mapping of the tornado’s path, two adjustments will be made to the preliminary tornado track reported on Tuesday.
The second adjustment to the preliminary report released Monday is the addition of a new and separate tornado that touched down around 3:30 PM CST in the extreme northern part of McHenry County. This EF0 tornado with winds estimated at 70 mph was approximately 50 yards wide and 200 yards long. The location of this tornado, based on information received from county officials, was between 42.4932N, 88.5704W and 42.4949N, 88.5697 W. The path of this tornado continued into Wisconsin and is being documented by the NWS office in Milwaukee and can be viewed here.