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Avalanche Forecast

Apr 21st, 2019–Apr 22nd, 2019
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Jasper.

Use conservative route finding to manage a freshly loaded persistent problem.

Keep an eye out for building windslabs.

Weather Forecast

Monday upto 8cm of snow accompanied by moderate SW winds gusting to 55km. Freezing levels to rise to 2200M

Tuesday will see cloud with an additional 5-10cm throughout the day along with moderate west winds. 2200M freezing levels

Wednesday will see slightly cooler temps -6 with winds remaining in the moderate west range and lower freezing levels 1900M

Snowpack Summary

15cm of recent settled snow now overlies several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Expect isothermal snow at lower elevations.

Avalanche Summary

Recent whumfing in low angle alpine terrain.

Natural and controlled avalanche cycle on friday produced persistent slabs, wind slabs and loose dry avalanches to mainly size 2 max size 3 in the alpine. 

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

Rising winds monday will redistribute recent storm snow to Lee features

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

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

The new snow load initiated a natural cycle on this problem the past couple of days. Give it a few days to settle.

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

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3