You right.

>The United flight comes a day after severe turbulence on a Hawaiian Airlines flight led to dozens of injuries. On Sunday, at least 36 people on Hawaiian Airlines Flight 35 were injured, according to Honolulu Emergency Medical Services, sending 20 people to emergency rooms.

Was going to say, the other flight had a lot more injured IIRC, so this must be a different one. I imagine the mix of already-warm air mixing with really cold incoming air is causing some unpredictable weather. Could be wrong of course, but hopefully this doesn't become a pattern.