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Now, you might be wondering, well, why is there a private, and by the way, May and June are typically the peak land spelt season in this part of Alberta, and it's similar for Colorado. So you might be wondering why then, why now? Well, so the Northern Tornadoes Project, they actually did a whole analysis on this, and they basically said, the key factor here, that during May and June, you have aggressive solar heating. You have a lot of dark agricultural fields, especially across central Alberta, and that naturally creates strong thermal updrafts, like a buoyancy. And when these updrafts develop directly on top of the foothills convergence zone, they act like a big vacuum, right, over where you have this line of pre-existing surface rotation. So the updraft just stretches the existing rotation and any localized vorticity on that, and it instantly tightens it up into a land spout.
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