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Archived

Avalanche Forecast

Mar 8th, 2018–Mar 9th, 2018
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Lizard-Flathead.

Fresh storm slabs are expected to be reactive to human triggers on Friday, especially in wind-affected terrain.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

THURSDAY NIGHT: 10-15 cm new snow / Strong southwesterly ridgetop winds / Freezing level around 1500 m.FRIDAY: 5-15 cm of new snow / Strong southwesterly ridgetop winds / Freezing level around 1500 m.SATURDAY: Mostly sunny / Light southwesterly ridgetop winds / Freezing level rising to around 1800 m.SUNDAY: Mostly sunny / Light southwesterly ridgetop winds / Freezing level rising to around 2000 m.

Avalanche Summary

Explosive control work near Fernie on Wednesday produced small slab avalanches up to size 1.5. Failing cornices also triggered size 2 slab avalanches on northerly aspects. Thursday's storm is expected to create touchy storm slabs reactive to human triggers.

Snowpack Summary

10-15 cm of new snow on Thursday is sitting on a sun crust on solar aspects.In the upper to mid snowpack, a surface hoar layer buried mid-February is now 80 to 100 cm below the surface on sheltered northerly aspects. Deeper in the snowpack, the widespread mid-December and late November weak layers are composed of a combination of crusts and sugary facets which are down 200-300 cm.

Avalanche Problems

Storm Slabs

Fresh storm slabs are expected to be reactive to human triggers on Friday.
Avoid terrain traps where small avalanches can have high consequence.Use small slopes with low or no consequence to test the bond of the new snow.Use caution when transitioning into wind effected terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2