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

Avalanche Forecast

Feb 17th, 2016–Feb 18th, 2016
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
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
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

Regions: Little Yoho.

Warm temperatures are settling the recent instabilities, and conditions for natural avalanches have improved but we still consider human triggering to be possible in some areas. Be very careful of any slopes that have not yet avalanched recently.

Weather Forecast

A SW flow over the area will bring isolated flurries over the next few days, along with temperatures ranging from 0 to -8 in alpine areas. Expect valley bottoms to be warmer. Winds are from the south, and will be relatively light for the next few days.

Snowpack Summary

Recent windslab and rapid cornice growth is occurring with 20- 40 cm of recent snow and moderate to strong W winds. A 60-130 cm slab overlies the January 6th weak layer of surface hoar (below 2000m), facets and sun crust. This layer is slowly breaking down but still giving hard sudden planar results in test pits. The lower snowpack is well settled.

Avalanche Summary

No new avalanches observed or reported on Wed in Little Yoho, although we are only a few days after a healthy avalanche cycle, and human triggering remains likely.

Confidence

Avalanche Problems

Persistent Slabs

60-130 cm of snow overlies the Jan 6th layer of surface hoar, sun crust and facets and there have been many avalanches on this layer over the last week. Snowpack tests are giving hard sudden planar results and it has been less reactive below treeline

  • Avoid paths that have not avalanched recently.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 3

Wind Slabs

Be mindful of cross loaded features and the lees of ridges where fresh windslabs 30-60 cm thick have recently formed. If triggered, there is potential to step down to the persistent weak layer and to ground in thin areas.

  • If triggered the wind slabs may step down to deeper layers resulting in large avalanches.
  • Use caution in lee areas. Recent wind loading has created wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2