Today, AA/MQ 4086 CLE-LGA 710 pm -854 pm is cancelled, citing weather. United Express to EWR is not cancelling any flights.
DL/Endeavor 5475 departing CLE 4:45 pm and DL/Endeavor 4075 departing 7:28 pm both operated.

While there are some storms in upstate NY, is this a case of "there's weather somewhere in the US so we blame weather for cancellation"? Or maybe, "there's not that much bad weather but we can't get our ducks in a row like United and Delta, tough luck for you"?

I've actually seen worse. The plane arrives for a flight, no delay. The same plane intended for the next flight is cancelled and used for another flight. They cite "weather" for the cancellation, but that is weather only in the most remote sense.