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Archived

Avalanche Forecast

Mar 19th, 2025–Mar 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
1: Low
The avalanche danger rating below treeline will be low
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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Recent strong winds have created a windslab in the Alpine

This time of year convective flurries can give intense localised snowfall and strong wind gusts that aren't in the weather forecast.

Confidence

Moderate

Avalanche Summary

The sun sure packs a punch this time of year! On Tuesday strong solar triggered a round of loose dry avalanches to sz 1.5 mostly from steep rocky terrain.

Some cornice triggered slabs have been observed over the week aswell.

Snowpack Summary

Convective squalls have incrementally delivered up to 50cm of new snow in the last week. Localized wind redistribution has been isolated to higher alpine features. The March 5th interface, down 50-100cm, consists of a crust &/or surface hoar (3-10mm, largest in the alpine).

Shaded, wind-sheltered areas above 1600m hold loose, dry snow (and great skiing!).

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

Weather Summary

Periods of snow and flurries for the next few days.

Tonight Cloudy with snow flurries. Snow: 2-5cms. Alpine low -6°C. Ridge wind SW 15km/hr gusting 45.

Thurs Mix sun & cloud. Alpine high -5°C. Wind SW 20 gusting 45km/h. Freezing Level (FZL) 1300m.

Fri Flurries. 10-15cm. Alpine high -3°C. Ridge winds SW 15-50km/h. FZL 1500m.

Sat Cloudy with flurries, trace snow. Alpine high -6°C. Wind SW 10-30km/h. FZL 1200m.

Terrain and Travel Advice

  • Even brief periods of direct sun could produce natural avalanches.
  • Carefully evaluate steep lines for wind slabs.

Avalanche Problems

Wind Slabs

Strong localised winds at ridge top are building a new windslab problem in the alpine. This problem should be isolated to immediate lee features and reactive to human triggering.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

A persistent weak layer (PWL), buried March 5th, is now down 50-100cm in the snowpack. Depending on aspect and elevation, this layer may be suncrust, facets and/or surface hoar. There's potential for step-down avalanches to this layer if dry/loose sluffs gather enough mass to overload it.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3.5