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Archived

Avalanche Forecast

Apr 24th, 2019–Apr 25th, 2019
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
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

Regions: Jasper.

Watch for building wind slabs in the alpine.

Weather Forecast

Parker Ridge:

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -2 C.

Ridge wind west: 10-20 km/h.

Freezing level: 2100 metres.

Snowpack Summary

Ongoing moderate to strong westerly winds have created fresh wind slabs in immediate lee features. This snow now overlies several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Expect unsupportive slush at lower elevations (below treeline).

Avalanche Summary

Recent whumfing in low angle alpine terrain.

1 size 1.5 Steep N aspect alpine, cornice triggered windslab that appears to have stepped down to a persistent layer.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Friday

Avalanche Problems

Wind Slabs

Continued winds Tuesday redistributed recent storm snow to lee features combined with new snow, and warm temperatures.

  • Watch for whumphing, hollow sounds and shooting cracks.
  • Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

New load with warm temps could increase the likelihood of triggering.

  • Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.
  • Note recent avalanche activity.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3

Loose Wet

Cooling weather on Wednesday should keep the snow cold. Watch out for sunny periods and slopes catching the sun.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5