CAT at a level that is dangerous is extremely rare. It can be forecast with some accuracy but certainly not absolute. As I mentioned before 98% of the time aircraft with injuries hit convective activity. I suspect that will prove the case here also. You often see incidents where they blame it on CAT but when the final report comes out and they overlay various weather sources they find the aircraft blundered into a convective cell. You can also get turbulence well downwind from large thunderstorms without penetrating the actual cell. In addition they can toss hail a considerable distance away from the cell.