Avalanche Forecast

Issued: Jan 24th, 2020 2:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada MBender, Avalanche Canada

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The main concern is wind slabs at upper elevations. Previous wind has created slabs on a variety of aspects.

Summary

Confidence

Moderate - Uncertainty is due to the limited number of field observations.

Weather Forecast

FRIDAY: Scattered flurries, moderate to strong wind from the southwest, freezing level up to 1500 m and alpine high temperatures around -3 C.

SATURDAY: Mainly cloudy with isolated flurries, moderate to strong wind from the southwest, freezing level up to 1500 m and alpine high temperatures around -2 C.

SUNDAY: Mainly cloudy with isolated flurries, moderate wind from the southwest, freezing level up to 900 m and alpine high temperatures around -4 C.

MONDAY: Mainly cloudy, light to moderate wind from the south, freezing level up to 900 m and alpine high temperatures around -4 C.

Avalanche Summary

There have been no reports of avalanche activity in the past few days.

There have also been a number of glide slabs that failed naturally as very large avalanches in the Torpy area recently. Glide cracks are seemingly unpredictable and need to be given a wide berth. There are some great photos on the PGBCSki FB page. Mild temperatures heading into this weekend could increase the sensitivity of glide slabs.

Snowpack Summary

Recent snow has settled with warm temperatures and been blown around by wind from various directions, resulting in wind slabs on all aspects at and above treeline. A weak layer of surface hoar buried in late December remains a concern but seems to be gaining strength. The layer has been found across much of the North Rockies region, but has seemed to be more acute in particular areas, such as around McBride and the McGregors/Torpy. It seems to be most readily found in sheltered treeline features 50 to 150 cm below the surface.

Terrain and Travel

  • Be careful as you transition into wind affected terrain.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
  • Avoid steep slopes when air temperatures are warm, or solar radiation is strong.

Problems

Wind Slabs

An icon showing Wind Slabs

Recent wind from a variety of directions has formed wind slabs in places we aren't used to seeing them. Watch for wind slabs in all wind exposed terrain. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Jan 25th, 2020 5:00PM