We have not had a 100-fatality tornado since the early and mid '70s. That is really significant.
This tornado occurred at 2 o'clock in the morning, one of the most dangerous times that a tornado can occur. People are not watching TV, it is dark outside, you can't see the tornado. Most are asleep at that hour.
When you get those kinds of conditions and you get a jet stream that is moving right into that area, that is exactly what we're looking for in environmental conditions that can produce a ... tornado outbreak like we had yesterday.