Source:
Guardian Unlimited printing AP article
At 2 AM Sunday morning, a tornado struck the Evansville, IN area killing 22 and injuring 200. This is Indiana's most lethal tornado since 1974 and appears to have been at least an F3 on the Fujita scale.
At least seventeen people were killed at the Eastbrook Mobile Home Park on the south side of Evansville. The tornado started across the Ohio River near Henderson, KY, slammed Evansville and proceeded eastward through Vanderburgh and Warrick Counties.
What's particularly frustrating to me is that tornadoes east of the Mississippi river are not nearly as well-studied as those west of the Mississippi. Part of the reason might be that Hoosier tornadoes are more likely to strike at night than Plains tornadoes are. It doesn't help researchers that Indiana tornadoes tend to develop a cloak of rain that obscures the tornado itself. And it helps nobody that there's a lot more to hit in Indiana than there is on the Great Plains while the mesonets and radiosondes are not nearly as widespread in Indiana as they are over the southern Plains.