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Archived

Avalanche Forecast

Jan 27th, 2025–Jan 28th, 2025
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Brazeau, Churchill, Cirrus-Wilson, Fryatt, Icefields, Jasper, Maligne, Marmot, Miette Lake, Pyramid.

One more warm day should keep you thinking about your exposure to steep terrain that is facing into the sun.

Confidence

Moderate

Avalanche Summary

Numerous solar triggered Loose Wet avalanches, initiating in steep south to west facing features in the alpine, were observed in the Icefields area on Jan 27. Several of these triggered slabs that ran on a deeper crust and were up to size 2.

Two size two Deep Persistent Slab avalanches, in previously uncontrolled alpine terrain, were triggered by explosives at Marmot Basin on Jan 26.

Snowpack Summary

A variety of surface conditions exist depending on location, including sun crusts, hard wind slabs, and soft faceted snow. These overlie a generally weak and faceted mid-pack. At the bottom of the snowpack are the early season crusts, which are faceting and surrounded by large depth hoar. The snowpack is 70-130 cm in depth at tree line, and thins quickly below.

Weather Summary

Tuesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -1 °C.

Ridge wind west: 15-30 km/h.

Freezing level: 1900 metres.

Wednesday

Mainly cloudy.

Precipitation: Nil.

Alpine temperature: Low -12 °C, High -7 °C.

Ridge wind southwest: 20 km/h.

Freezing level at valley bottom.

Terrain and Travel Advice

  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
  • Be mindful that deep instabilities are still present in the snowpack.

Avalanche Problems

Loose Wet

Remain cautious in or under steep terrain that faces into the sun, it is still pretty warm for the end of January. These avalanches have the potential to initiate a deeper slab.

Aspects: South East, South, South West, West.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

A variety of crusts with facets above and below exist at the bottom of the snowpack. These layers are going to be with us for a long time and pose a low probability, high consequence situation if triggered.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 2.5