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

Avalanche Forecast

Mar 6th, 2022–Mar 7th, 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
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

After a few stunning days without the west winds, they returned Sunday afternoon and should usher in  cloud and a touch of snow for Monday. With diminished solar input the sensitivity of the persistent slab should diminish but keep it in mind...

Weather Forecast

A low pressure system is set to sweep down through Alberta from the NW Sunday night.. this will bring increased clouds in the morning and light snow in the afternoon. Freezing levels should just reach valley bottom and the clouds should keep solar heating at bay however expect westerly winds to continue to build into Monday morning.

Snowpack Summary

30-40 cm of snow has solidified into a slab overlying the February 16 sun crust on steep southerly aspects. Solar heating has created new crusts on steep solar slopes. Westerly winds returned Sunday to create light wind effect on alpine slopes.

Avalanche Summary

Forecasters in the Chickadee and Boom valleys today saw evidence of slab activity on steep solar slopes: a sz 2.5 Na likely initiated Saturday right at treeline and may have reached Boom Lake while a sz 2 moist slab initiated with solar heating in one of the Chickadee paths just below the rocks at treeline to wipe out several sets of tracks...

Confidence

Timing or intensity of solar radiation is uncertain on Monday

Avalanche Problems

Persistent Slabs

This crust facet layer down 30 to 40cm on steep slopes at treeline and above has produced several natural and skier triggered avalanches over the last few days. Diminishing solar inputs and cooling should decrease the sensitivity of these slabs.

  • 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 - Possible

Expected Size: 1 - 2.5