jack hayes welcome, what's happening in the upper atmosphere to cause what for some parts of the country are the worst storms in merely 80 year approximates? >> i would say, ray, it's both upper atmosphere and lower atmosphere. if i might start with the lower atmosphere. what we had this past week was a prolonged period of southerly flow off the gulf bringing warm, humid air not southern tier of the united states, east of the mississippi river. if you combine that with a strong jet stream that originated up in the canadian region and you bring that into juxtaposition, you focus account energy and then you have a triggering mechanism with the heat and the funnel testimony that was slowly moving across that set off the outbreak that we saw that went from arkansas all the way to georgia and up into virginia. >> suarez: are there any variables that make one year relatively calm and another one catastrophic? >> that's really the 64 dollar question. i think 2008 we saw nearly 1800 tornadoes and the very next year when we were all prepared for an active season we saw far less than that. so you

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