there's a large swath of north carolina hit where crops provide a big employment boost. so we're going to keep our eye on that. now just to give you some perspective, we normally see about 163 tornadoes for the entire month of april. but this latest outbreak produced 230 tornadoes in just three days. this is one of the most recent ones. this is wilson, north carolina, on saturday. and then this next video from jackson, mississippi. look at the power flashes in the video. those are actually transformers blowing out. what's surprising is the number of cars that they saw still on the road, seemingly oblivious to a nearby tornado and 150-mile-per-hour winds. and there's a monster storm for tulsa, oklahoma, on thursday. it's what they call a multi vortexed tornado. one main tornado and smaller tornadoes actually circling around it. i'm joined now by amy clement professor of oceanography at the university of miami.