2018 Labor Day Tornado Genesis
Saturday, April 13, 2019
A September 3, 2018 Labor Day isolated severe storm cell produced two quick tornadoes in Iowa. The following images show the tornado genesis as it progressed from my spotting position in Linn County. Above, the cell moves east (left) at 5:17 pm CDT after having produced a previous twister west of Alburnett, Iowa. An inflow cloud feeds into the base of the storm like a counter-clockwise wheel. The camera looks southwest from Central City Road and Sutton Road, about 2.3 miles WSW of Central City.
5:36 pm. Looking SSW. A lowering forms under a striated rotating cloud as it moves right-to-left in the image. Dangerous CG lightning was occurring at this time.
5:40 pm. The leading edge of the storm has now almost reached Sutton Road (background left). Note the appearance of a clear slot at background center.
5:42 pm. My position has now been moved to Sutton Road, about .22-mile south of Central City Road. Camera looks SSW at funnel moving right-to-left (west-to-east) in the image.
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