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Archived

Avalanche Forecast

Dec 22nd, 2023–Dec 23rd, 2023
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
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, Sugarbowl.

Continuously assess conditions as you move through terrain. Watch for signs of instability.

New snow amounts vary through the region, there's uncertainty in reactivity of surface hoar.

Confidence

Low

Avalanche Summary

Poor visibility has limited observations. We have received reports of debris from large avalanches in run outs at treeline. Likely storm slabs starting in the alpine.

If you go out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

30 to 70 cm of recent dense storm snow has buried a variety of previously wind-affected surfaces at upper elevations. Below treeline the snowpack will have a new surface crust with moist snow below.

A concerning surface hoar layer is down roughly 40 to 100 cm at treeline and above.

The mid snowpack likely contains multiple frozen crusts, while the lower snowpack is generally faceted. Average snowpack depths at treeline vary significantly.

Weather Summary

Friday Night

Partially cloudy with no new snow expected, west alpine wind 20 to 50 km/h, freezing level falling to valley bottom.

Saturday

Mostly sunny with no new snow expected, southwest alpine wind 25 to 40 km/h, treeline temperature -3°C.

Sunday

A mix of sun and cloud with no new snow expected, southwest alpine wind 25 to 40 km/h, treeline temperature -3°C.

Monday

A mix of sun and cloud with no new snow expected, southwest alpine wind 25 to 40 km/h, treeline temperature -3°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Be carefull around freshly wind loaded features.

Avalanche Problems

Persistent Slabs

Buried surface hoar may still be rider triggerable.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 2.5

Storm Slabs

Storm slabs may remain sensitive to rider traffic at treeline and above.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5