Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Jan 9th, 2017–Jan 10th, 2017
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
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

Regions: Little Yoho.

Ice climbers take note of the recent new snow and the potential for loose snow avalanches. Though only small avalanche are expected, they may have a significant affect to an ice climber.

Weather Forecast

One last pulse of snow is expected this evening as the arctic air moves in. Moderate winds will taper to low by tomorrow and temperature will drop to the low -20s. This cold air mass will arrive with clear sky's and is not expected to last for weeks ....

Snowpack Summary

10cm of new snow sits over firm slab in the alpine, this new snow has had some wind affect. Expect small reactive windslab development in the alpine. At treeline and below the new snow remains low density and overlays a faceted snowpack. Areas with even some cohesive slab structure near the surface have the potential to fail over the facets.

Avalanche Summary

No natural activity was reported or observed in Little Yoho Monday. Some recent observations in the surrounding area continue to show occasional slabs failing on the mid-pack facets during the last week. Lots of whumphing on the mid-pack facets at treeline was reported recently in the Stanley Mitchell area.

Confidence

Avalanche Problems

Persistent Slabs

In areas with less than 150cm of snow the weak mid-pack facets from December remain. This is a concern wherever a more cohesive slab of snow sits on top of this weakness. Tree line or wind loaded areas seem to be the primary concern.

  • Be aware of the potential for wide propagations.
  • Watch for whumpfing, hollow sounds, and shooting cracks.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Wind Slabs

Small windslabs and loose snow avalanches are expected to be reactive for the next few days. The main concern for this problem is in areas with significant terrain traps. Take extra precautions when traveling around cliffs and steep gullies.

  • Use caution above cliffs where small avalanches may have severe consequences.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2