Avalanche Forecast

Archived

Feb 10th, 2019–Feb 11th, 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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You are likely to trigger a large slab avalanche, particularly where winds have formed stiffer snow surfaces or where a convergence zone sets up (likely in the Mountain Loop area) and delivers hefty snow totals. This round of snow Sunday night brings us closer to a threshold for more widespread avalanche activity. Choose lower-angle and simpler terrain where the consequences of the current uncertainty will be lower.

Discussion

Snow and Avalanche Discussion

Unusual avalanches have been reported in the adjacent Mt. Baker zone. When we see unusual avalanches, it’s usually a good time to choose terrain where we know the consequences of a mistake will be small.

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.