I am in process of collecting season snow totals. I have about 55 areas so far and usually end up with about 80.
Jay, like several others (Jackson, Alyeska, etc.) collects both upper and lower measurements but only quotes upper in press releases. In Jay's case the lower number was 214, so a representative mid-mountain number would be 294 inches.
Alta measures mid-mountain so its 324 inches is probably the highest ski area snowfall in the lower 48 states even though it may be Alta's record low season! I say "may be" because the Alta Collins mid-mountain site was not in use in 1976-77. The Alta Guard site at 8,700 feet (maintained by UDOT) recorded 277 inches this season vs. 314 in 1976-77.
In the prior extreme western drought seasons of 1976-77 and 1980-81 Targhee tallied 372 and 382 inches (vs. 301 this year), so it's safe that whatever the highest continental US snow number is for 2014-15, it's a record low.
In Canada the Mt. Fidelity weather station at 6,100 feet above Rogers' Pass recorded 417 inches. Nearby Revelstoke Resort gets considerably less snow and does not measure in April, but based upon snowfall before April and the relationship to Fidelity, Revelstoke at 6,000 feet probably got about the same as Alta.
I would not be surprised if the more obscure ski areas to the north, Shames and Powder King, got more snow, but I've never been able to track down data from either place. No other Canadian areas got as much snow as Alta or Revelstoke.
Finally, I'm still waiting on Alyeska's mid-mountain stats. The upper site got 491 inches in 2014-15, but Alyeska was known to have a lot of rain lower down like the rest of the West Coast. Last year Alyeska had 446 at the top but only 292 mid-mountain.
There are many record lows this year: Bear Valley, Heavenly, Northstar, Sugar Bowl, Squaw's base, Alpine Meadows, Snoqualmie Pass. I don't have them yet, but Mt. Baker, Stevens Pass and the Central Sierra Snow Lab near Donner Pass will surely be record lows also.
Mammoth and Arapahoe Basin.
Mammoth has had 145 inches. A-Basin had 266 through April, so might get close to 300 before it closes.
Edited by Tony Crocker - 5/16/15 at 6:19pm