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Archived

Avalanche Forecast

Apr 6th, 2025–Apr 7th, 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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

A weak overnight freeze and incoming wet storm will stress the snowpack.

Travel below tree line will be atrocious in isothermal snow.

Confidence

Moderate

Avalanche Summary

A natural avalanche cycle is expected on Monday.

Natural wet loose avalanche activity up to size 2 was observed throughout the highway corridor on Sunday with the most action on solar aspects.

Snowpack Summary

10-15 cm of new snow is expected above 1800m on Mon. Storm snow will sit over a temperature crust which formed everywhere but N aspects in alpine during the warm temps on Sun.

A 10-25cm thick crust from the March 27th rain event is buried 30-50cm deep.

Below 2300m moist snow can be found within the upper / mid snowpack giving the snowpack at lower elevations a drastically different structure

Persistent weak layers linger in the mid snowpack but are not expected to wake up this week

Weather Summary

Rain showers with snow at and above 2000m.

Tonight Cloudy with clear periods. No precipitation. Wind S 25-40 km/h. Freezing Level (FZL) 2200m

Monday Rain & wet snow.12 cm. Alpine high 0 °C. Wind SW15 gusting 40 km/h. FZL 2400m

Tuesday Flurries, Trace precipitation. Alpine high -3 °C. Wind SW 15-30 km/h. FZL 1800m

Wednesday Mainly cloudy with scattered flurries. Up to 5cm. Alpine high -1. Ridge wind SW 15-25. FZL 2000m

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • The first few hours of rain will likely be the most dangerous period.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Avalanche Problems

Storm Slabs

Fresh Storm slab is developing at upper Treeline and in the Alpine. Storm slabs sit over a temperature crust formed on Sunday evening which will act as a very slippery bed surface and increase the reactivity of the new snow. This crust exists on all but North aspects in the Alpine.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Loose Wet

A weak overnight freeze and rain/ wet snow will quickly saturate the snowpack at lower elevations making Wet loose avalanches likely.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5