EMSC
Well-known member
Anecdotally, I feel that this is now occurring in Denver too. Virtually never had rain as part of winter storms (~mid-Nov - end of March) even 20 years ago; but in a warm winter like this one, a fair number of storms have some or even significant rain mixed in, usually in the early part of storms. The good news of course being that most of Colorado has quite a lot of altitude margin for most ski resorts.The relationship of temperature to altitude is clear cut. The 1C rise in temperature we have seen in the past 50 years translates to 500 feet of elevation. So barring something unusual about the microclimate we can probably say that it rains for example now at 7,000 feet at Tahoe as much as it rained at 6,500 feet in the 1970's.
As far South as Denver appears to be on a map, latitude wise Denver is roughly equal to Philly/Baltimore or in Europe would be a touch South of Madrid, Spain. But with the altitude and interior rocky mountain climate of course.