By mid-April Alta is close and PC is either closed or left over slush. Go to Snowbird or plan on hiking. You never know though, we've had some sick storms into May.
plan on utah being just as good as anywhere mid april, I doubt well have a shitty base by then the storms have been quite "thick n heavy" this season. I'd plan on going to the bird though cuz alta has to close 4/20 every year
late season last year was sick. i skied waist deep powder at solitude on my birthday March 27. and they had a 200 inch base. but cant say if this year will be the same