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Archived

Avalanche Forecast

Mar 8th, 2022–Mar 9th, 2022
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
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.

A skier accidental size 3 on Vermillion Peak today has created uncertainty with forecasters. Focus on North, shady and polar aspects, and avoid steep sunny slopes where this crust lives, even though the air temp is cold.

Weather Forecast

Cool temperatures will persist into Wednesday with the alpine ridge temp as cold as -25. Wednesday also appears generally clear with light wind from the SW. Cloud cover, and slightly warming temps are expected Thursday and Friday.

Snowpack Summary

5-20 cm of snow over a sun crust on steep solar aspects that exists up to about 2600 m. Little in the way of wind slab development today. February 16 sun crust down 20-40 cm on steep southerly aspects. January 30 facet or sun crust interface is down 50-80 cm. Lower snowpack is well settled. Typical shallow areas remain faceted.

Avalanche Summary

A skier triggered a large persistent slab (size 3) on the south slope of Vermillion Peak. No involvement was reported. Details available on the MIN. This avalanche has created much uncertainty amongst forecasters. Forecasters also received a report of a cornice triggered size 2.5 avalanche on Mt. Carnavon in Yoho that occurred within 24 hours.

Confidence

Avalanche Problems

Persistent Slabs

The crust facet layer down 20-60cm on steep slopes at treeline and above has produced a sz 3 skier accidental avalanche on Mar 8. This avalanche has created much uncertainty. The buried crust will be more prominent on solar aspects, less so on polar.

  • Use extra caution on solar slopes or if the snow is moist or wet.

Aspects: South East, South, South West, West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 1.5 - 3