for answers, we turn to howard bluestein, a professor of meteorology at the university of oklahoma. you for joining us, professor. we just saw that map in which all of those reported tornadoes throughout the entire midwest. how unusual was it to see a wave of storms like this? >> well, it's very unusual to see a wave of storms like this this time of year. this is something that we expect might happen in march or april. but it's extremely unusual to have such a wide spread outbreak in the midwest in november. >> ifill: let's walk through some of the unusual features here. when was the time of day when these tornadoes struck? we're kind of used to hearing about late afternoon warnings that come, touchdowns of tornadoes. but not an early morning one. >> yes, this was extremely unusual. i believe the storms began around 9:00 in the morning. and usually we need to get the sun's heating during the day to get the storms going am but in this case, a very, very powerful storm system came through that lifted the air very, very early. and we didn't need to get to be very warm for the storms to