Tornado's in 2012?

"The Weather Underground's Dr. Jeff Masters speculates the last two years may have been the most severe in America's history, dating back to 1816. Something has changed. It may be a temporary aberration, but an apparent eastward shift in Tornado Alley may threaten millions of Americans who still believe a tornado is something only experienced in Kansas. But Chicago, Nashville, Atlanta and Washington D.C.?" - much more very important information at the link provided.