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Archived

Avalanche Forecast

Nov 25th, 2020–Nov 26th, 2020
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Jasper.

An early season refresh of low density new snow has hidden any lingering, exposed hazards. Excellent riding can be found throughout the forecast region.

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Weather Forecast

Alpine temps expected to remain steady (-10 to -15) with intermitted, light flurries over the next couple of days. Moderate sw winds at tree line (TL). A further 20mm (~10cm)  forecast, beginning Friday afternoon, and tampering off by Saturday am. Excellent skiing can be found at TL and, in sheltered areas through the forecast region. 

Snowpack Summary

The snowpack is highly variable depending on location. Height of snow at Parkers is ~100cm at treeline. The Nov.4 crust found up to 2600m, and is ~70cm deep. Test results on this crust have shown a mix of mod sudden/resistent planar results. Continued wind slab develop on N and E aspects ridge top down into treeline. Basal layers continue to weaken

Avalanche Summary

Avalanche control at Parkers Ridge today produced numerous, loose dry slides and a very healthy sz 2 that swept across the road. Dimensions of the slab, 100m x 200m x 60-100cms depth. Continued, moderate loading from steady sw winds and light HST observed after mid-day.

Confidence

Avalanche Problems

Wind Slabs

New snow and strong winds have created freshly formed wind slabs in immediate lee's.

  • Be careful with wind loaded pockets while approaching and climbing ice routes.
  • Use caution in lee areas. Recent wind loading have created wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Loose Dry

New HST lingering on cliff sides and ice climbs. Ice Climbers be wary of this over head hazard.

  • 874
  • Be careful with wind loaded pockets while approaching and climbing ice routes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 1.5

Persistent Slabs

Pockets of previous wind deposited snow overlies the Nov 4 rain crust. Test results are mixed on this layer but appears to be becoming more reactive with increased loads and continued faceting

  • Pockets of persistent slabs linger on alpine lee features.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3