CheeselandSkies
Member
I feel like a disproportionate number of the April 27th tornadoes displayed visible horizontal vortices, is there a reason for that?
As @MNTornadoGuy said, it's a phenomenon that seems to be associated with high-end outbreaks because it's caused by extreme shear/vorticity. It was common with tornadoes from June 2, 1990 (OH Valley outbreak, 7 F4s) and April 26, 1991 (Andover/Red Rock). Not sure if I've seen photos of them specifically from 1974 or Palm Sunday 1965, but I wouldn't be surprised. Tri-state 1925 probably would have had some, too if anybody could have seen them.