The National Weather Service's Davenport Forecast Office was dispatched to rural Stephenson County Tuesday to perform a damage survey to assess whether the damage caused by Monday's storm was the product of a tornado, or straight-line winds.

Their conclusion: An EF-0 tornado with estimated 85 MPH winds.

According to the team's findings, "There were several areas along the path of storm damage. A cluster of storm damage in the center of the path was consistent with a brief, weak tornado."

The path of the tornado was just 1/3 mile long, with the width of the twister a maximum of 200 yards during it's brief time on the ground.

While given the weakest classification on the Enhanced Fujita scale, the twister managed to snap several trees at the trunk, take a tin roof off a shed, and uproot a pine tree.

Gathering reports of witnesses to the storm the survey team included the following in its report.

"Witness inside barn described windows blown in, paint "sandblasted" off walls, and hay blowing out west door being carried north of barn. Empty grain wagon pushed 25 yards northeast of barn. Four calf huts picked up by wind, moved, one apparently lofted half mile down road to northeast. Sheet metal damage inside grain bin, bent and twisted. Hay conveyor rolled twice. Duration estimated about thirty seconds."

"Witness described heavy rain, then mud preceding wind. Witness described funnel shape before wind, unable to determine rotation due to speed/rain."

There was also a report of a large tree branch down on a car. This was determined to be caused by straight-line winds.

For the complete NWS damage survey, click the link provided below