Some scattered showers and thunderstorms moved from the Oskaloosa, IA area northeastward into northwest Illinois overnight. One storm was severe between 2 am and 230 am as it moved from just south of Swisher, IA toward Ely. This storm produced what is known as a wet microburst, which resulted in wind gusts between 70 and 90 mph. Sporadic tree damage was reported along the path as well as some minor structural damage.
Radar images from 213 am CDT July 27, 2011