Storm arrived Midvale at 10pm Sat. I was at the Bird at same time as you. But tried without luck to get tickets at the ticket office in the Cliff Lodge.Michel at Snowbird Center while we picked up our passes. Wicked windy but the storm hasn't arrived yet.
Here's the deal for those using a seasons pass (Premium or Gold only at MCP areas eg Squaw, Mammoth,Aspen, JH etc)
These give you half price but both Snowbird and Alta say you can't prepurchase your ticket ahead of time. You have to go to the Alta ( i checked Alta also) or Snowbird ticket office the day you ski.
Only wiggle room seems to be you can purchase the next day in the afternoon the day before.
Note: You can still get the regular MCP passes with 2 free days in advance. That's a different animal..