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September 7, 2020 at 4:12 pm
#446043
Gavin Pretor-Pinney
Keymaster
Thanks for this question, Dave. And for your fine answer, Dan!
It is indeed an example of asperitas. The formation mechanism is never too clear, but one hypothesis is that the chaotic wave features in the vicinity of a storm are to do with gravity waves that are trapped between inversion layers.
Those are great shots!