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Archived

Avalanche Forecast

Apr 5th, 2022–Apr 6th, 2022
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Jasper.

Strong winds have created fresh wind slabs in the alpine. On Wednesday watch out if the sun comes out -  wet loose avalanche down low and cornices up high could wake up.

Weather Forecast

Wednesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -8 C.

Ridge wind west: 10-25 km/h.

Freezing level: 1400 metres.

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -8 C, High -3 C.

Ridge wind southwest: 15 km/h.

Freezing level: 2000 metres.

Snowpack Summary

Strong SW winds are redistributing the recent snow into lee features in the alpine and down into treeline. The freezing level is around 2200m. There is a sun crust high into the alpine on solar aspects and and melt freeze crust up to 2200m. There is a well settled mid-pack.

Avalanche Summary

A few small, size 1 wind slabs have been observed in higher elevation leeward features.

Confidence

Timing or intensity of solar radiation is uncertain on Tuesday

Avalanche Problems

Wind Slabs

Strong SW winds created fresh wind slabs. These new wind slabs sit over a variety of firm surfaces including wind effected snow and sun/temperature crusts.

  • Use caution in lee areas. Recent wind loading has created wind slabs.
  • Watch for stiffer feeling snow. Avoid areas that appear wind loaded.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Loose Wet

Main concern during the heat of the day and solar input.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.

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

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5

Cornices

Fresh cornices might become reactive with strong solar input

  • Cornices become weak with daytime heating, so travel early on exposed slopes.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3.5