I'm booked on the above red-eye in a miles plus copay seat and just got a weather waiver notice via email from AA for 7/28 and 7/29. Expert Flyer found upgrades available to NYC via ORD and CLT but with similar timeframes. Should I change now, hoping for more connection choices if the PDX-PHL flight is canceled, or sit tight?

UPDATE: The ORD availability disappeared and I opted to rebook for a CLT connection, since there are multiple fights to NYC a day. Hoping to at least make it to the East Coast Saturday morning.