The Associated Press reports that the killer tornado that killed over twenty people in Southern Indiana was a very large strong F3 tornado. Tornadoes of that strength are rare in November.
The deadly tornado that obliterated homes across a swath of southwestern Indiana was unusually intense and fast, packing winds that topped 200 mph as it roared through the night at up to 75 mph, meteorologists said Monday.
The storm's strength, its 41-mile path of destruction and the fact that it struck in the middle of the night in November are all unusual, said Dan McCarthy, warning coordinator at the National Oceanic and Atmospheric Administration's Storm Prediction Center in Norman, Okla.
The Tornado Project has a web page that explains the Fujita Scale. They also have a list of this year's killer tornadoes. Sunday mornings tornado was the worst so far this year. There is a risk of severe weather in the Midwest today according to the SPC convection outlook.
Update: Here is a link to the NWS Survey indicating that the tornado was an F3. A post on our BloggersBlog.com site has links to local blogosphere coverage and photos.
