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Archived

Avalanche Forecast

Mar 23rd, 2023–Mar 24th, 2023
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
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: Kakwa, McGregor, North Rockies, Pine Pass, Tumbler.

Continue to practice good group management, high mark steep slopes one at a time and minimize time below cornices.

Confidence

Moderate

Avalanche Summary

Numerous size 1-1.5 wet loose avalanches triggered by solar radiation were reported on sunny aspects at upper elevations on Monday and Tuesday as well as one large natural cornice fall which did not trigger a slab on the slope below.

Snowpack Summary

Expect the snow surface to change throughout the day. A crust will likely be found at treeline and below and on sun exposed slopes in the morning. Moist snow could be found on these same slopes by mid day. Light flurries may bring fresh dry snow to upper elevations.

The middle of the snowpack is generally well-settled and strong.

A weak layer of large facets is found near the base of the snowpack. This layer could still be a concern in very shallow snowpack areas.

 

Weather Summary

Thursday Night

Cloudy with up to 5 cm of new snow possible. Light southerly winds and a Low of -4°C at 1500 m.

Friday

A mix of sun and cloud with the possibility of light flurries bringing up to 5 cm of new snow. Light variable winds and a High of -1°C at 1500 m. Freezing level rising to 1400 m.

Saturday

A mix of sun and cloud with the possibility of convective flurries bringing up to 10 cm of new snow. Light southwest winds and a high of -2°C at 1500 m. Freezing level rising to 1400 m.

Sunday

A mix of sun and cloud with the possibility of flurries bringing up to 5 cm of new snow. Moderate northeast winds and a high of -6°C at 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet
  • Minimize your exposure time below cornices.

Avalanche Problems

Deep Persistent Slabs

A weak layer of facets exists near the base of the snowpack. The likelihood of human triggering is low given the layer's depth, but large triggers such as cornice failures or smaller avalanches in motion have the potential to produce very large avalanches with surprisingly wide propagation. Suspect terrain for human triggering includes steep, shallow, and rocky terrain where the snowpack transitions from thin to thick.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2.5 - 4