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Archived

Avalanche Forecast

Feb 15th, 2015–Feb 16th, 2015
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
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.

http://www.pc.gc.ca/apps/scond/Cond_E.asp?oID=19299&oPark=100092

While parts of the Little Yoho region are improving quickly...we are still wary about the effect of all the recent load in any areas with weak basal layers or poor storm snow interfaces. Travel cautiously until the snowpack adjusts to the new load.

Weather Forecast

Light NW winds, tree line temperatures staying below freezing, no new precipitation, and a mix of sun and clouds is the forecast for the next few days. Watch for the effects of solar heating on steep south aspects when the sun comes out.

Snowpack Summary

Recent wind slabs have formed on many different aspects at higher elevations. 60-80 cm of settled storm snow at treeline and above overlies a generally settled snowpack. Some snow pits have found facets at this storm snow interface. Isothermal snow exists at low elevations. Cooler temperatures will help with overnight crust formation.

Avalanche Summary

No new avalanches observed today in Little Yoho, but a recent natural cycle occurred East of the Divide in Banff/Yoho/Kootenay. These were mainly triggered by recent loading by N winds and sun. Click here for photos of these events. As well, a few skier triggered slides were reported over the last 3 days in the Banff/Yoho/Kootenay region.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Recent winds from many directions have formed wind slabs that are susceptible to human triggering. Recent cornice growth is also a concern as these may trigger any deep weak layers that are present in the snowpack.

  • Use caution in lee areas. Recent wind loading have created wind slabs.
  • Extra caution needed around cornices with current conditions.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3