dang, where's a camera when ya need one? i've never seen one that big this far east. not even close--just a couple dozen feet high of dust in an updraft is the extent of it. this IS the time of year to see 'em... atmosphere isn't nearly as warm aloft as it will be later, and surface heating is very strong.
i've got a fuzzy pic of one with me in the foreground, in the breakdown lane of i-10 east of van horn, tx with a tall plume of dust off in the distance. it doesn't seem that impressive until you see the tiny house, a speck nearly a mile away, with the dust devil off beyond that. that thing was at least a couple thousand feet tall...
i keep thinking i want see a tornado up close, too, but after one blew my old high school away in march i've decided ONLY on my terms.