Schedule is posted (shoutout Kimball for posting it on Twitter). As noted by Jeff last year,
This long-running west Nebraska contest has a unique set up: the top scoring group in Tier I, Tier II, Tier III, and Tier IV automatically qualify for finals. Then they take the next two highest scoring groups. The judges have the ability to add a seventh finalist as a "wildcard" group, though this is optional.
Schedule (times in MDT):
4:00 - 27th Street Singers (daytime exhibition), awards to follow
7:00 - finals begin
8:45 - Choralaires (evening exhibition), awards to follow