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Archived

Avalanche Forecast

Mar 8th, 2025–Mar 9th, 2025
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Heavy snowfall and strong winds will create very dangerous avalanche conditions.

Travel in avalanche terrain is not recommended!

Confidence

Moderate

Avalanche Summary

Loose/dry surface sluffing has been easily triggered by riders & snow sliders, this will continue as the new snow falls.

Evidence is still visible of the large natural avalanche cycle from earlier in the week triggered by the high freezing levels and strong sun.

Snowpack Summary

Up to 10-30cm of snow recently buried variable surfaces, including a breakable crust, widespread surface hoar, and sastrugi in the Alpine.

Lurking below this is a persistent weak layer (PWL) of surface hoar, facets and/or suncrust (Jan 30th) 50-80cm down. Feb 16 is another PWL (facets/crust/surface hoar) down 30-40cms. Both of these layers are reactive to human triggering, and are present/reactive in lesser traveled areas within the park (ie Bostock Pass).

Weather Summary

The storm continues through the weekend. Roger's Pass will see heavy snowfall and strong winds.

Tonight Snow 10cm. Alpine low -5°C. Southwest ridge winds 35km/h gusting 70km/hr. Freezing level (FZL) 1300m

Sun Heavy snow. 20-25cm. Alp high -4°C. Ridge wind SW 25 gusting 70km/h. FZL 1500m

Mon Cloudy with flurries. Snow: 4cm. W wind 20 gusting 45km/hr. FZL 1000m

Tues Cloudy. Alp high -6°C. light winds. FZL 1200m

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Storm slabs in motion may step down to deeply buried weak layers and result in very large avalanches.
  • Avoid the runout zones of avalanche paths. Avalanches could run full path.

Avalanche Problems

Storm Slabs

Incoming storms will bring moderate to heavy precip with strong winds. This will build a widespread storm slab that will be most reactive in areas with wind transport. Storm slab depths will build throughout the weekend. Natural avalanche activity is almost certain, limit your overhead exposure

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3

Persistent Slabs

Buried persistent weak layer (PWL) 's exist in the upper and mid snowpack. Warm temps promoted the settling of a cohesive slab on top of this layer of suncrust/facets/surface hoar. This layer is still producing results in snowpack tests and sporadic avalanches in neighbouring operations

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3