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Archived

Avalanche Forecast

Feb 9th, 2022–Feb 10th, 2022
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
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
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

Regions: Little Yoho.

Warm temperatures are expected to continue on Thursday. Forecasters are uncertain to what degree this will impact both the wind slab and persistent slab problems. Cooling on Friday will improve conditions (but maybe not the skiing).

Weather Forecast

Warm temperatures will persist into Thursday, and will then return to seasonal temperature range on Friday. There also is a possibility that small amounts of snow could arrive Wednesday overnight (~10cm). Wind will remain elevated from the West in the strong range.

Snowpack Summary

Warm temps have settled recent storm snow in the alpine. Expect wind slabs in lee areas from previous wind event. At tree line and below the recent storm snow is beginning to develop into a slab, which overlays the Jan 30 surface hoar and sun crust. This interface is found 20 to 30cm down. Shallow snowpack areas remain weak and faceted.

Avalanche Summary

Very little in the way of substantial avalanche reports from either ski area today. Other than observations of pin-wheeling from steep south aspects in the alpine, no avalanches were observed or reported.

Confidence

Due to the number and quality of field observations on Wednesday

Avalanche Problems

Wind Slabs

Continued strong westerly wind is redistributing snow in the alpine today. As you approach treeline, expect to encounter slab development. Take the time to investigate what the recent snow is sitting on and how it is bonding.

  • Caution on open steep slopes at treeline that have been exposed to wind loading.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

This layer exist as surface hoar in sheltered areas and sun crust on steep southerly aspects 30 to 40cm down. We have observed few avalanche on this interface so far. Warm temps could settle this slab further making it more reactive on Thursday.

  • Dig down to find and test weak layers before committing to a line.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2