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Avalanche Forecast

Apr 19th, 2025–Apr 20th, 2025
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Glacier.

New snow and wind will create a reactive storm slab in the Alpine.

Expect rain at lower elevations, making already challenging conditions worse.

Confidence

Moderate

Avalanche Summary

Few natural avalanches have been observed on the highway corridor over the past few days.

Neighboring operations are reporting small wet loose avalanches on solar facing terrain and natural cornice falls.

Last week there were a couple of notable skier triggered avalanches from high, north facing, alpine slopes where a sneaky layer of surface hoar was buried. One was on Bruins glacier and the other on the Dome, check out the MIN reports here and here.

Snowpack Summary

Spring storms have brought abit of new snow to the alpine and rain to lower elevations

Daily melt/freeze cycles are affecting the surface of the snowpack on solar slopes and all aspects up to 2200m, with several crusts of variable strength in the upper snowpack.

High alpine, north facing slopes still hold dry snow. A spotty surface hoar layer exists down ~20cms in sheltered north alpine areas..

Below treeline, conditions are variable and challenging travel exists.

Weather Summary

We'll experience unsettled weather Sunday & Monday with new snow and gusty winds.

Tonight Flurries. snow: 6cm. Alp low -6°C. Ridge wind W light gusting 35km/hr. Freezing Level (FZL) 1400m

Sun Flurries. Snow: 9cm. Alp high -3°C. West wind 10-20km/hr. FZL 1800m

Mon Flurries: 7cm. Trace precip. Alp high -4°C. West wind 10-25km/hr. FZL 1800m

Tues Sun & cloud. Trace precip. Alp high 1°C. Wind: W 20-40 km/hr. FZL 2000m

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

Avalanche Problems

Storm Slabs

Moderate winds and new snow will create a slab in the alpine where snow depths will be the greatest . Evaluate terrain carefully for wind slabs at ridge top in immediate lees.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

A couple days of rain at lower elevations will destabilize the snowpack. When sun hits the new snow for the first time expect to see avalanche activity.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2