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Avalanche Forecast

Archived

Jan 21st, 2017–Jan 22nd, 2017

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

If triggered Avalanches may run full path! Watch the sun and daytime heating today, conservative terrain selection is advised.

Weather Forecast

Today will start out sunny, cloud increasing throughout the day with a chance of flurries later this afternoon. Alpine high of -5, freezing level to 1500m and light to Mod winds variable in direction.

Snowpack Summary

Height of snow @ tree line is near average for this time of year. We received between 40 to 60cm of storm snow last week with warm temperatures and strong winds creating a storm slab. This layer will need time to heal and bond to older surfaces like near surface faceting and wind slabs.

Avalanche Summary

Significant natural and explosive triggered avalanche cycle on wednesday, residual avalanches on Thursday to size 3.5. Natural avalanche activity has decreased, however we did observe one natural size 3.5 in the highway corridor out of steep North facing terrain yesterday morning!

Confidence

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.