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Archived

Avalanche Forecast

Feb 25th, 2022–Feb 26th, 2022
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
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
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: Jasper.

Winds changing to southerly and increasing in strength on Saturday. Main concern is wind slab in the Alpine and open Treeline; may see an increase in sensitivity with additional load on Sunday.

Weather Forecast

Saturday: Isolated flurries with trace. Alpine High -8 C. Ridge wind SW 15-25 km/h. Freezing level valley bottom.

Sunday: Flurries 10cm. Alpine Low -10 C; High -6 C. Ridge wind SW 20 gust 55 km/h. Freezing level 1400m.

Monday: Scattered flurries 5cm. Alpine Low -11 C; High -3 C. Ridge wind SW 10-20 km/h. Freezing level valley bottom.

Snowpack Summary

10-15cm from last weekend has been redistributed by northerly winds causing reverse loading in many locations with wind slab development in Alpine and exposed terrain at tree line. A weak temperature crust present up to 1900m on all aspects with a sun crust on solar aspects up to 2800m. Basal facets & depth hoar found throughout the forecast area.

Avalanche Summary

A few natural size 1 dry loose avalanches observed and reported through the MIN on the Icefields Parkway Tuesday and Wednesday - most occurring in steep terrain.  No patrol today.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Wind Slabs

Wind slabs sit over a variety of surfaces including old wind slabs, temperature crust and sun crust making reactivity variable. Be extra cautious in areas where wind slabs sits over a hard layer.

  • Watch hollow sounds on unsupported windslabs.
  • Be careful with reverse loaded pockets of wind slab at ridgeline.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Loose Dry

This problem is specific to steep, wind protected terrain. Expect more dry loose activity in areas where recent snowfall sits over a hard surface.

  • Avoid ice climbs exposed to steep rocky terrain on solar aspects during the middle of the day.
  • Be careful of loose dry sluffing in steep, confined or exposed terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 1