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Archived

Avalanche Forecast

Mar 23rd, 2025–Mar 24th, 2025
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
4: High
The avalanche danger rating below treeline will be high
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high

Regions: Glacier.

A widespread storm slab is developing as temperatures rise over the next few days.

Avoid avalanche terrain until the freezing levels come back down.

Confidence

Moderate

Avalanche Summary

A widespread natural avalanche cycle is expected to begin Sunday evening. Size and frequency will increase as freezing levels rise through Tuesday.

Snowpack Summary

An additional 10- 20cm on Sunday brings our weekly storm total ~70cm. Rising temperatures and recent moderate to strong SW wind has created a wind spread storm slab at all elevations.

The March 5th interface is down 50-100cm and consists of a crust &/or surface hoar.

Two persistent weak layers (PWL) of facetted snow from cold temps in Jan/Feb are now buried 120-160cm beneath the surface.

Weather Summary

Steady moisture and skyrocketing freezing levels continuing into next week.

Tonight Snow ~13cm. Wind SW 20-40 km/h. Freezing level (FZL) 1400m.

Mon Scattered flurries, trace precipitation. Alpine high -3°C. SW winds gusting 45km/h. FZL 1800m.

Tues Snow, 13cm. Wind SW 25-gusting 50km/hr. Alpine high 2°C. FZL 2400m.

Wed Mainly cloudy, trace precipitation. Wind SW 15-25km/h. Alpine high 5°C. FZL 3100m.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

Avalanche Problems

Storm Slabs

Continued snowfall and rising temperatures have created a widespread storm slab problem.

Expect these surface slabs to be most reactive in terrain exposed to the SW winds or at lower elevations where rain on snow is possible.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 2.5

Persistent Slabs

A persistent weak layer (PWL), buried March 5th, is now down 60-120cm in the snowpack. Depending on aspect and elevation, this layer may be suncrust, facets and/or surface hoar.

This layer may wake up with the incoming load of new snow and wind!

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2.5 - 3.5