Replying to Alta and Snowbird in January

Im going to Alta for 4 days and Snowbird for one in Mid January. Last year they had approx. 265 inches around that time. I was thinking I was going to be skiing deep snow and have awesome conditions, but now that I realize that some east coast resorts get that much snow, im a lil worried. Was i just having dillusions of grandure when i was thinking that I would be skiing sick pow and everything would be open and in pristine condition? I would change my plans and move them into mid fubruary or later but I already booked my flights and all. Locals or people who ski there all the time...should I be worried?