Snowpack trends over the past year at Isle 12n in an interactive calendar format. View seasonal patterns on the mountain and see how an evolving climate has affecting snowpack levels over the past year. Click on any day to see what the snowpack was for that day, or sign up for a free account to view data for the past 10,650 days. The snowpack average over the past 10 days was 13.6 inches, with a day to day variation of about 3.41 inches.