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Archived

Avalanche Forecast

Feb 14th, 2021–Feb 15th, 2021
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
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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: Jasper.

Warmer temperatures will take a while before having any effect on the recently faceted snowpack. Ice climbers, watch for dry loose avalanches as even a small slide could have serious consequences.

Weather Forecast

Monday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: High -12 °C. Light ridge wind. Freezing level at valley bottom.

Tuesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: Low -16 °C, High -13 °C. Ridge wind light to 15 km/h. Freezing level at valley bottom.

Snowpack Summary

The cold weather continues to promote facetting of the upper 40cm. The mid-pack is showing signs of losing strength with the prolonged arctic influence, especially where it is shallow. Widespread wind effect in the alpine and upper tree line.

Avalanche Summary

Road patrol on Feb 13 observed numerous Natural Loose Dry Avalanches up to size 1.5, starting steep terrain, but running the distance in terrain over 30 deg. One size 2 serac triggered wind slab, up to a meter deep, was also directly observed that day. No patrol on Sunday

Confidence

The weather pattern is stable

Avalanche Problems

Loose Dry

Surface snow continues to lose cohesion and structure making specific areas susceptible to light triggers like direct solar influence, and excitable riders. Sluff awareness and management will be very important in steep and/or confined lines.

  • Pay attention to overhead hazards like cornices which could trigger slabs or larger sluffs.
  • On steep slopes, pull over periodically or cut into a new line to manage sluffing.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2

Wind Slabs

Recent windslab activity has been noted in high elevation windloaded features. It seems to require a large trigger such as cornice failures to initiate or potentially a shallow location where a skiers weight may be enough.

  • Give cornices a wide berth when travelling on or below ridges.
  • Travel on ridgetops to avoid wind slabs on slopes below.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2