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Avalanche Forecast

Archived

Mar 4th, 2022–Mar 5th, 2022

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

Regions

Glacier.

Spring is in the air.

Pack your sun screen and you shades, and dial back your terrain selection on solar aspects during the heat of the day.

Weather Forecast

We are into a cooling/drying trend after our warm wet weather from earlier this week, with high pressure over Rogers Pass.

Tonight: Clear periods. Alpine Low -11*C. Light NE ridgetop winds.

Sat: Sun, convective clouds in the PM. High -8*C. Light N wind.

Sun: Sunny periods, isolated flurries. Low -11*C, High -10*C. Light W wind.

Mon: Flurries.

Snowpack Summary

Fluctuating temps have settled the upper snowpack & created a surface crust below 1500m (higher on solars).

Up to 45cm of snowfall early in the week, with warm temps and a brief wind spike, created storm slabs over the Feb 26th interface - wind effect in open areas, small surface hoar and facets in sheltered terrain, and sun crust on steep solars.

Avalanche Summary

Friday: Field teams observed a few size 1-1.5 loose snow avalanches triggered by the sun on steep slopes. There was similar activity in the highway corridor.

Thursday: A field team triggered a size 1.5 storm slab on a NE aspect at treeline, and there was a MIN report of an avalanche involvement on the Dome exit.

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.