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That's what I was wondering. One potentially just East of Defiance and another basically splitting Defiance and Irwin.Am I seeing two seperate rotations on it?
I know there have been cooler temperatures for violent tornadoes but that usually happens in the early season. Though it does happen later in the tornado season it just seems more rarer.Instability is not just about what is at the surface. It's 100% about the vertical distribution of those factors with height through the column of the troposphere. 500mb temperatures are -15C and colder in the supercell outbreak area up there. There have been instances in Iowa specifically with F3-F4 long-track tornadoes with surface temperatures in the upper 50s. Despite the surface observations as they are, mesoanalysis still shows 1500-2500 j/kg of SBCAPE nosing up into a good bit of southwestern Iowa and southeastern Nebraska.
Stream of the new Iowa tornado. Still very large and dangerous.
Deleted it for redundancy's sake.Great minds think alike.
Definitely tracks with the ~20,000 ft debris lofting in that area.This looks high end. EF3-4 range.