I also think that while many of the indicators which I initially believed were EF5 candidates (water tower, UK Research Facility, many slabbed homes) had limiting factors to achieve a higher rating, I think both of the churches struck in Mayfield were genuine EF5 damage indicators. (I don't think either were officially surveyed by NWS and uploaded to DAT though I think Tim Marshall surveyed one).
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Proper brick construction with connections like that is realistically the best construction you are really going to find - and the fact it was completely destroyed amazes me
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This DI is hard to classify, which might be one reason it was never surveyed by the NWS "officially" (?) though damage fits the highest DOD in all of the closest matching DIs, as well as a presumably EXP-UB construction. Fairly confident this would have been rated EF5 even in Moore & Joplin era. I don't have much knowledge on the other church though I think the situation was similar. Maybe the NWS will update this when the religious building DI is added to the new EF Scale, as they mentioned in that presentation once.
Also still believe there is some case for one or two of those supposedly well built Bremen homes given contextual as well. Probably would have gotten EF5s in the same way El Reno 2011 and Philadelphia did.
The tornado was clearly without a doubt an EF5, but I'm more interested whether there were actual EF5s indicators even with a stringent standard - which I do think there were. The survey seems already rushed and half attempted as it is though I do appreciate the huge distances that needed surveying. Anyways, can't believe its over two years now.