I remember an event like a decade ago I worked at Topnotch Resort for a second job, one night they were pouring rain at 1,000ft but 3 miles away at 750ft there was 4" and dumping snow. The only thing I could think of is the wind flow was off a ridge up at like 1800ft behind the hotel where as the village was in a straight shot up valley. Like a small eddy of slightly warmer air from a 700 foot terrain drop had it raining at a higher elevation than plowable snow a few miles away.
In this event... we are up to 6-7" above 3,000ft.