I've been watching AS 717 from PHX to SEA all week. It has been cancelled once and delayed 30 minutes every day. I've already checked the flight status for tomorrow (8/31) and AS has already posted a 30 minute delay!!! What is wrong with this flight? Why do they know that it's already going to be 30 minutes late? Yesterday, the inbound flight was on-time, but the outbound was delayed 30 minutes.

Can someone from AS explain this to me??? I am flying on this flight tomorrow. Why would the inbound be on-time and the outbound be 30 minutes late already (18 hours in advance)?