I sometimes question the huge water totals that this site observes. I have visited it many times in the winter and am always amazed at how much snow there is there – typically the snowdepth there (@ 8000 ft) is comparable to Alta–Collins (@9700 ft). There is little doubt that it is an incredibly snowy place. I'm not sure I buy a 10" increase, but I'm sure they got plastered. Let's assume the data is legit. This puts them at 71% of average, with a snowpack SWE that is comparable with early Jan in an average year (compare green and blue lines).
At Snowbird the snowpack SWE increased from about 9 to 15 inches (green line). This also puts them at about 71% of average with a snowpack consistent with early January in an average year.
Finally, looking to the Park City side at Thaynes Canyon we see an increase in snowpack SWE from about 5 to just over 8 inches. This gives them 63% of average snowpack, which is similar to late December in an average year.
So, as far as the snowpack is concerned, the holidays have finally arrived in the Wasatch.