Avalanche Forecast

Archived

Feb 11th, 2019–Feb 12th, 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 unlikely, human triggered possible.

Regions

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Continued snowfall with wind and warming will lead to dangerous avalanche conditions Tuesday. Avalanches could run far and fast. Avoid open slopes greater than 35 degrees where you are likely to trigger avalanches.

Discussion

Snow and Avalanche Discussion

About three feet or more of snow has fallen in since Friday morning. The recent snow has fallen at cold temperatures and may be weakly bonded to a hard underlying crust. The most recent snow has fallen with strengthening winds and gradually warmer temperatures making slab avalanches more likely. Avoid suspected wind loaded terrain, especially near ridges and choose conservative terrain during this time of elevated danger.

Snowpack Discussion

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.