Avalanche Forecast

Archived

Feb 12th, 2019–Feb 13th, 2019

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Natural avalanches possible, human triggered probable.

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Natural avalanches possible, human triggered probable.

Regions

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Dangerous avalanche conditions exist at all elevations. Use extra caution around slopes steeper than 35 degrees. Be especially careful of areas where the wind drifts new snow.

Discussion

Snow and Avalanche Discussion

The Mountain Loop area received more than three feet of snow over the weekend, and two-plus feet of new snow in the past 24 hours. The recent snow has fallen at cold temperatures and may be poorly bonded to variable old snow surfaces including surface hoar, firm crusts, and low-density storm snow layers. The most recent snow has fallen with strengthening winds and gradually warmer temperatures making slab avalanches more likely. Avoid wind loaded terrain, especially near ridges, and choose conservative terrain during this time of elevated danger.

Recent avalanche in the Mountain Loop area. 2/10/19 Gary Newberry Photo

Snowpack Discussion

New Regional Synopsis Coming Soon

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.