I just checked the TV schedule sections of the websites of KCBS (Los Angeles) and KCNC (Denver). I always thought SOTU was aired live across all time zones, but according to their listed schedules, KCBS will air SOTU at 9:00 PM Pacific Time and KCNC at 8:00 PM Mountain Time, both with TPIR at Night at its regular time of 8 PT / 7 MT.
The West Coast ABC stations don't even have it listed at all. I checked KABC (Los Angeles) and KGO (San Francisco) and they have the usual schedule for Wednesday 4/28. I know usually when they air SOTU, it pre-empts the 6:00 news, Jeopardy!, and Wheel of Fortune (ABC World News airs at 5:30 on the West Coast, not 6:30). The latter two usually get moved to 9 or 10 PM to fill the void in the primetime schedule left by SOTU's slot for the East Coast.