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Archived

Avalanche Forecast

Mar 10th, 2021–Mar 11th, 2021
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

New wind slabs have been created in the Alpine. Watch for them as you transition into your descent line.

S'ly aspects were recently baked by the strong March sun, creating a breakable crust well into the Alpine.

Weather Forecast

Daytime convective flurries will cruise through Rogers Pass today, followed by sun and cloud the next couple of days.

Today: Cloudy with isolated flurries and sunny periods, Alp high -8*C, light/mod W winds

Thurs: Sun and cloud, Alp high -8*C, light W winds

Fri: Sun and cloud, Alp high -2*C, light SW winds

Snowpack Summary

A dusting overnight (~5cm) has covered up a breakable suncrust on SE through W aspects, while N'ly aspects remain soft and dry. Yesterday's afternoon winds created isolated wind slabs in immediate lee areas and ridge crests.

Avalanche Summary

Several small, solar-induced avalanches to sz 1.5 were noted from steep, rocky S'ly aspects. Explosive testing at the W end of the park resulted in one sz 2 thin wind slab avalanche from 14 rounds in total. A icefall-triggered sz 2.5 was observed in steep, glaciated terrain below Mt Jupiter; the icefall did not trigger any surface slab.

Confidence

Avalanche Problems

Wind Slabs

Yesterday's spike in S'ly winds redistributed recent storm snow. Small, isolated wind slabs can be found in immediate lee areas/ridge crests in the Alpine.

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: North, North East, East, West, North West.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2