Climatology of Caribou's Snow Pack

Since snow depth measurements began in Caribou in the 1940s, it has always held a substaintial snow pack for at least part of the winter. The average start date of a 1 inch snow pack is December 5th, and the average end date is April 10th. But significant variations have occurred, with the snow pack beginning or as early as November 12th (1968-69), as late as 1982-83 season snow pack starting Jan 16th (1982-83).

The deepest and most reliable snow pack is attained during the second half of February. Keep in mind these are averages, and that any one season is unlikely to follow them exactly.

Average Snow Depth and Probability of snow pack by date
Date Avg Snow
Depth
(in inches)
Probability of
having 1 inch
on ground
Probability of
having 10 inches
on ground
Nov 15 1.2 36% 0%
Nov 20 1.8 48% 2%
Nov 25 2.4 58% 5%
Dec 1 4.2 71% 14%
Dec 5 5.4 76% 20%
Dec 10 5.9 79% 27%
Dec 15 7.1 84% 30%
Dec 20 9.1 91% 41%
Dec 25 10.2 94% 45%
Jan 1 12.8 98% 61%
Jan 5 13.9 97% 64%
Jan 10 15.4 99% 64%
Jan 15 16.3 99% 74%
Jan 20 17.0 98% 77%
Jan 25 17.4 99% 78%
Feb 1 18.1 99% 79%
Feb 5 18.4 100% 83%
Feb 10 19.2 100% 84%
Feb 15 19.8 100% 85%
Feb 20 21.3 100% 86%
Feb 25 21.8 99% 85%
Mar 1 21.3 99% 84%
Mar 5 20.1 99% 82%
Mar 10 19.7 98% 81%
Mar 15 18.4 98% 78%
Mar 20 16.4 96% 73%
Mar 25 13.8 90% 56%
Apr 1 8.6 86% 39%
Apr 5 7.2 78% 34%
Apr 10 5.8 71% 24%
Apr 15 3.4 60% 11%


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