I saw on another thread that someone was claiming Mt. Rose for greatest 24 hour snowfall with a whopping 76 inches. If that's true, kudos.
...However...there was a lot of hate toward Colorado and it's "lack" of intense storms. I'll give the Sierra's credit, they do get wicked storms. Tons of winds and heavy wet snow. However, the Sierra Nevada Virtual Museum claims this....
"Second greatest United States 24-hour snowfall record: 67 inches (5.6 ft.) January 4-5, 1982. The old California record of 60 inches in 24 hours was recorded at Giant Forest in the southern Sierra Nevada in January 1933. "
"The North American and world records are held by Silver Lake, Colorado, which received 76 inches (6.3 ft.) in 24 hours on April 14-15, 1921."