Well, I do after 340 days skiing there since 1978. Snow preservation is easily top 10 in North America, exceeded only by a handful of places in Colorado that are both 9,000+ feet at resort level and heavily north facing, with A-Basin being #1.
Spring conditions in January/February are extremely rare other than on the ~25% of terrain on the lower Canyon/Eagle side with mostly east exposure. Mammoth averages over 50% packed powder surfaces to about the first week of April.
Patrol records show rain at Main Lodge at the rate of less than one day per season November-April. Sustained rain for as much as a full day continuously to the top of the mountain has happened once in winter since I've been skiing, at New Year's 1997, the same storm that flooded Squaw and Yosemite Valley. The early February 2015 storm was the next closest event. It rained continuously below 9,500 feet and intermittently to the top. Wind exposed ridges high up had some resulting ice, but there were still skiable packed powder lines on the upper half of the mountain after that storm. TR with pics from the week after that storm: http://www.firsttracksonline.com/boards/viewtopic.php?t=11720
good to know.
just heard today--Only 6.5% of 2015 precipitation at Lake Tahoe (6000') fell as snow, the lowest in history.(Partly explained by a couple of big rain events last summer and a very dry Jan--March)
the good news for the Tahoe area is the the Sierra is rising 1-2mm per year so maybe a few million years from now our snow will be as good as Mammoth (and you'll need oxygen to ski Mammorth).
Edited by oldgoat - 7/28/16 at 9:47pm