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Avalanche Forecast

Archived

Jan 10th, 2021–Jan 11th, 2021

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

Regions

Glacier.

Expect windslabs in lee and crossloaded alpine features

Weather Forecast

A trace of snow today with light SW wind as the high pressure ridge traps a little moisture and valley cloud from the system to the west. Tomorrow light snow accumulating up to 10cm by the evening and mod to strong SW wind. Tuesday more snow with strong winds from S to W and temperatures rising before dropping off as the system passes.

Snowpack Summary

A thin surface crust on S and W aspects at all elevations and surface hoar 10mm in the shade to treeline. The Dec 26 surface hoar has been extremely hard to find down 70 on the old storm interface. The Dec 7th surface hoar/crust/facet layer is down 1.5m. Crusts and facets persist at the base of the snowpack

Avalanche Summary

Size 1-1.5s are catching people out in high consequence terrain in the park as well as nearby. Several skier accidentals were reported in the backcountry around RMR on Wednesday to size 2.5 including one burial to the neck

Confidence

on Sunday

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.