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Archived

Avalanche Forecast

Jan 9th, 2015–Jan 10th, 2015
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
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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Touchy buried surface hoar and widespread propagation indicate the need to avoid avalanche terrain for a little while.

Weather Forecast

Moderately colder weather accompanied by cloud and a few flurries will only slowly heal the weaknesses in the snowpack.

Snowpack Summary

Continuous widespread Whumphing in Yoho today indicates the surface hoar on the raincrust problem down 45cm has not changed significantly since the last storm. Wide propagation indicates good slab formation even below treeline. Areas of windslab overlying weak facets near ridgetops and on exposed alpine areas are prone to failure.

Avalanche Summary

No natural activity was noted today.

Confidence

Avalanche Problems

Persistent Slabs

The Dec 18 layer of surface hoar and crust is now buried 50-70 cm and primed for human triggering. Avoid any areas where avalanches can start at treeline and above.

  • Whumpfing is direct evidence of a buried instability.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3

Storm Slabs

Storm slab formation has been limited due to light winds but gullies and large open slopes at treeline and above are best avoided for a few more days..

  • If triggered the storm slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Wind Slabs

  • If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.
  • Be careful with wind loaded pockets

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3