What impresses me is that some of these are actually accurate (or accurate so far as I know) because they appear in
Significant Tornadoes — but that uses photos that are either taken before or after the ones here: e.g. the Norton, KS and Isabel, SD photos. Also, I didn't know that the Cheyenne, WY, Wamego, KS (the ones that show two in the shot; the second is mislabeled "San Luis Obispo, CA, April 7, 1926"), or Austin, TX photos were part of a series.
Most impressive of all, I think, is this:
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http://www.oznet.ksu.edu/wdl/climate/historicalphotoshtml/photos/20.jpg . . . which may be more familiar in EXTREMELY retouched form as this:
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http://www.photolib.noaa.gov/historic/nws/images/wea00218.jpg It seems tha they've used original prints (or at least fairly early generation ones) here, which makes me wonder where they've all been obtained from, especially since they aren't all Kansas tornadoes so they mightn't just be things lying around the house that local people have brought in.