Many years ago [the 1980s?] the Met Office led research into CAT and one remark from a leading scientist managed to stick:
"One aircraft reports severe CAT, exact location and height, and we go straight away to find it. Never did find it. Severe CAT is like a shoal of fish in a big ocean".
Not surprising because a lot of CAT is in effect comparable to an earthquake in that we are witnessing a sudden release of strains, tensions, which may or may not rebuild.