June 20th Pella, Iowa Tornado
June 20th featured extreme instability, moderate wind shear and good lift along an advancing boundary over Iowa. We started the day from Denver, CO as it was the first day of the tour. After an early departure, we made it just east/southeast of Des Moines, Iowa (650 miles later!) just in time for storms to explode. The first supercell we intercepted was just east of Des Moines and never had the “look” like it wanted to become tornadic. Nice structure and a rotating wall cloud occurred, but it could never tighten up enough to produce a tornado. We dropped south and headed back west a little bit as a second storm quickly became organized. It developed a strong hook echo on radar to the west of Pella. As we arrived in town near the factory, we stopped to watch. Intense lightning was also occurring, a tell tale sign of storm intensification. Within a few minutes, a large bowl shaped funnel formed. Soon it developed into a full fledged cone shaped tornado that was on the ground for several minutes. In my haste to shoot video, time lapse and digital images, I failed to get a proper focus on my camera and thus most images were slightly blurry. The tornado dissipated and the storm eventually weakened as it moved east, ending our chase. A great first day for Tour 8!! Enjoy the pics, blurriness and all !!!!!
No comments yet.