This is more than a catchy slogan. The scientific fact is that Utah's snow is lighter and drier.
Moisture rises from the Pacific, climbs the Sierras and gains altitude when it hits the jet stream.
As the altitude increases, the air gets thinner and colder and passes across the hot, dry western deserts. The expanding dry, hot air over Utah's high altitude desert causes the moist jet stream air to thin one final time, forming very fine molecules with a ratio of roughly three parts air to one part water. Then these molecules scale the Wasatch mountains and dump about 500 inches of very light, very dry flakes in Alta and surrounding ski areas. The snowfall is computed in inches as a 60 year average, at 9,500 feet elevation. Please note that 9,500 is about the mid-way elevation at the Alta Ski Area and that the Alta Lodge is at 8,600 feet.