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Archived

Avalanche Forecast

Dec 18th, 2024–Dec 19th, 2024
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
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
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

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

Don't be lured into committing to a line by the new snow. Investigate the snowpack before skiing. Ice climbers watch for loose dry avalanches off steep rocky terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed along the Icefields Parkway on a road patrol on Wednesday.

Snowpack Summary

15-20 cm of snow fell on Wednesday at the Parker Ridge Area. The 7mm Surface Hoar that formed last week is likely flattened by winds but assume it could be preserved under new snow in sheltered locations. The mid and lower snow pack has multiple layers of surface hoar in sheltered terrain, melt freeze crusts and facets.

Weather Summary

Thursday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -7 °C.

Ridge wind southwest: 15 km/h.

Freezing level at valley bottom.

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -7 °C, High -6 °C.

Ridge wind southwest: 15 km/h.

Freezing level: 1600 metres.

Terrain and Travel Advice

  • Be mindful that deep instabilities are still present in the snowpack.
  • Be careful as you transition into wind-affected terrain.
  • Small avalanches may cause climbers to fall or bury belayers and gear.

Avalanche Problems

Wind Slabs

New snow and strong winds have created new wind slabs. Avoid wind loaded large unsupported terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

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 along time and pose a low probability, high consequence situation if triggered.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Loose Dry

Ice climbers watch out for loose dry avalanches off steep rocky terrain. Even small avalanches in the wrong spot can have serious consequences.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 1.5