Was this photo you refer to?
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The scored material on the left side was likely asphalt mastic to me but I'm not entirely sure.
It reminds me of this damage of Bakersfield valley(pic of left)
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likely scoured cement here?
Of all destroyed houses in jarrell, this one interested me most
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It didn't looked like typical wood frame or brick veneer house in US. Instead, it was made of heavy marbles with bolts further reinforced. The material it used reminds me of some houses in Czech like this one near peak intensity (these were likely foam brick rather than marbles) Rated F4.
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I think Sawmaster would have better opinion on this.
I think the fact that Jarrell can scour several roads it crossed during peak intensity was incredible. Most violent tornados can at most scour one tiny portion of one particular road which can be coincidence or road quality problem sometimes. For Jarrell, damage like this was more than likely due to its sheer intensity rather than coincidence.