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Archived

Avalanche Forecast

Mar 14th, 2019–Mar 15th, 2019
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
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: Jasper.

Temperatures are continually rising throughout the weekend. This will be the first significant change for over a month. This warming trend has the potential to trigger the first spring avalanche cycle

Weather Forecast

Friday will be sun and cloud, no precipitation, Alpine high of -7 C, and 15-35km/hr West winds. Saturday will be clouds with sunny periods and flurries, trace precipitation, low -10 high -5, light West winds, and freezing level 1600m.

Snowpack Summary

Windslabs located in the alp and TL on N to E aspects. The snowpack is relatively strong through most of the region especially in deep snowpack areas. Shallow areas are weak, and will morph quickly to moist 'spring like' slab conditions from the surface down. With the persistent basal weakness, this could fail with the full depth of the snowpack.

Avalanche Summary

On March 12th, a group of skiers triggered a wind slab in the backcountry behind Marmot Basin in Whistler creek locally known as Ed's Alley. It was on a North Alpine Aspect with shallow snowpack, scree ground, and severely wind affected.Several large wind slab avalanches on alpine NE aspects ran Monday after a weak storm.

Confidence

Freezing levels are uncertain on Sunday

Avalanche Problems

Loose Dry

Natural triggering has abated but human triggering remains a possibility, particularly in steep sheltered terrain.
Minimize exposure to steep, planar slopes.Be aware of party members below you that may be exposed to your sluffs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2.5

Wind Slabs

Fresh windslabs sit on a variety of old surfaces. Winds continue to gust moderate from the SW.
Avoid steep lee and cross-loaded slopesBe aware of the potential for wide propagations due to the presence of hard windslabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5