Avalanche Forecast

Archived

Jan 21st, 2020–Jan 22nd, 2020

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Natural avalanches possible, human triggered probable.

Alpine

Natural and human triggered avalanches likely.

Treeline

Natural and human triggered avalanches likely.

Below Treeline

Natural avalanches possible, human triggered probable.

Regions

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Stormy conditions in some locations could make it difficult to assess and manage avalanche problems Wednesday. Choose routes with plenty of options to avoid steep open slopes and adjust to the dynamic weather conditions.

Discussion

This weather pattern appears to favor the volcanoes with weather forecasts predicting the highest precipitation in those areas. However, this is a very dynamic weather system with lots of uncertainty. Choose travel plans with options to easily adapt to changing conditions during the day. Some areas may receive less new snow and consequently could experience lower avalanche danger.

Snowpack Discussion

New Regional Synopsis coming soon. We update the Regional Synopsis every Thursday at 6 pm.

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.