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Archived

Avalanche Forecast

Mar 27th, 2025–Mar 28th, 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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

It is uncertain how well the snowpack will recover from the recent rain and high elevation temperatures.

Make conservative decisions and avoid overhead hazards while the snowpack heals.

Confidence

Moderate

Avalanche Summary

A rain event into the alpine caused a widespread natural avalanche cycle on Wed. Numerous large wet avalanches ran down into the valley bottom.

Neighboring regions have reported serious incidents and very large avalanches.

Snowpack Summary

30mm of rain/wet snow has destabilized the upper snowpack. How well the wet snow will recover with a overnight freeze is somewhat uncertain.

The March 5 PWL consists of a crust &/or surface hoar and is down 60-120cm. There is concern that wet avalanches will step down to this PWL and may entrain more snow at lower elevations.

Additional PWL's from Jan/Feb are now buried 140-190cm deep.

Weather Summary

A general cooling trend with scattered flurries through to Sunday.

Tonight: Trace precip. Alpine low -3°C. West wind 20km/hr. Freezing Level (FZL) 1600m

Fri: Cloudy w/ scattered flurries. 5cm. Alpine high -2°C. South wind 10-35km/hr. FZL 1900m

Sat: 6cm. Alpine High -3°C. West wind 15-25km/hr. FZL 1800m

Sun: Mainly Cloudy. Trace precip. Alpine high of -1°C. Wind NE 10km/hr. FZL 1900m

Terrain and Travel Advice

  • Triggering deep layers is more likely if the snow surface didn't freeze overnight.
  • Wet avalanche activity may step down to deeply buried persistent weak layers at lower elevations.
  • Make conservative terrain choices and avoid overhead hazard.

Avalanche Problems

Loose Wet

It is uncertain how well the snowpack will recover from the recent warming & rain. If there is a poor freeze overnight, expect wet loose avalanches to still be of concern.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 1.5 - 2.5

Persistent Slabs

A persistent weak layer (PWL), buried March 5th, is down 60-120cm. Depending on aspect and elevation, this layer may be suncrust, facets &/or surface hoar. New avalanches may step down to this layer resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2.5 - 4