The Storm Prediction Center in Norman, Oklahoma did an amazing job predicting this. They were predicting a very dangerous weather system coming through the midwest well in advance (at least 24 hours).
Here's a map of all the severe weather occurances that occured yesterday accross the midwest. Quite a terrible outbreak.
There's at least 32 reported dead, 8 missing, and dozens of homes and businesses destroyed. The tornado that hit Kansas City may have been a possible F5, but only analysis of the damage done will tell the result.
So far today there have already been five more tornadoes in Tennessee with a barn, home, and elementary school destroyed.
Like somebody says, some of these places look like downtown Baghdad. This is a very bad disaster.