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Archived

Avalanche Forecast

Mar 9th, 2025–Mar 10th, 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
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Heavy snowfall and strong winds have created dangerous avalanche conditions.

Now is a great time to visit your local ski hill and avoid avalanche terrain in the backcountry!

Confidence

High

Avalanche Summary

A large natural avalanche cycle (up to size 3.5) began overnight Saturday into Sunday due to large snowfall amounts and strong southerly winds. Several avalanches have reached the ends of their runouts.

A group up the Asulkan Valley triggered a size 2 avalanche today, which partially buried one of their party members.

Avalanche control is beginning in the highway corridor at 4pm today.

Snowpack Summary

Up to 50cm of snow (and counting!) has been combined with moderate to strong southerly winds. This new snow buries a variety of 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) 70-110cm down. Feb 16 is another PWL (facets/crust/surface hoar) down 60-90cms.

Weather Summary

The atmospheric river is forecast to transit out of BC Monday morning.

Tonight Flurries, 12cm. Ridge winds west 20km/h gusting to 80. Freezing level (FZL) 900m.

Mon Cloudy with flurries. Trace accumulations. SW wind 15 gusting 40km/hr. FZL 1100m

Tues Cloudy, trace of snow. Alp high -6°C. Light ridge winds. FZL 1300m.

Wed Flurries, 9cm. Light ridge wind. Alp high -4°C. FZL 1400m.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be aware of the potential for larger than expected storm slabs due to buried surface hoar.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

Avalanche Problems

Storm Slabs

This atmospheric river is bringing heavy precip with strong winds. This is building a widespread storm slab that is reactive on all aspects and elevations. Natural avalanche activity is very likely, limit your overhead exposure

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3

Persistent Slabs

There are buried persistent weak layer (PWL) 's down 50-110cm in the snowpack, consisting of suncrust/facets/surface hoar. This weekends storm slab may overload these layers, causing large, destructive avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3.5