Was your flight originally scheduled to be Delayed and then re-instated to being On Time? If that was the case, then yes I can see how crew scheduling might have forgotten to call the crew with the new time of departure, given the weather mess.

If your flight departure time was never changed, then it is up to the crew to wake themselves up, get the van from the hotel and be at the airport one hour prior to departure.

I have watched flight times change from on time, to many hours late, to back on time because of aircraft swaps.