GNFAC, December 2015

The Lookout
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Tuesday, December 29, 2015 - 2:51pm GNFAC

A rotten way to start the season.

The snowpack is a record of weather events that take place during the winter. Heavy snows, wind, and even long dry spells, help create unique layers in the snowpack. The order in which these weather events occur determines both the structure and stability of the pack. The layers that tend to cause the most avalanche problems generally form between storms. Known as persistent weak layers, depth hoar, surface hoar, and near-surface facets are all problem layers that form in southwestern Montana. Each of these can exist in the snowpack for long periods of time.

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