Here is another video of that storm on May 8, 2009, that caused widespread damage and killed several people. It formed strong bow echos and with derechos that caused much of the damage along with some small tornados.
Yes, it was a while ago, but it was an unusual event, and its radar image and progression are interesting. This is a close-up that follows this one storm system from its genesis over Kansas until it crosses over Virginia into the Atlantic. For this animation I used NOAA composite radar images stored at mesonet.agron.iastate.edu on the suggestion of a reader. Thanks! Some technical discussion and production notes after the break.
