Avalanche Forecast

Issued: Apr 3rd, 2022 4:00PM

The alpine rating is high, the treeline rating is high, and the below treeline rating is high. Known problems include Storm Slabs and Loose Wet.

Avalanche Canada rbuhler, Avalanche Canada

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The ongoing storm will continue to develop touchy storm slabs on Monday. Large, natural avalanches should be expected and extremely conservative terrain selection is essential including avoiding exposure to overhead hazards.

Summary

Confidence

Moderate - Uncertainty is due to the timing, track, & intensity of the incoming weather system. Uncertainty is due to the limited number of field observations.

Weather Forecast

A major storm system is expected to continue to impact the region until Monday night and may end up lingering into Tuesday morning. Snow amounts are uncertain and may be highly variable across the region. 

Sunday Night: Snowfall 20-40 cm, strong to extreme SW wind, freezing level low around 800 m. 

Monday: Snowfall 20-40 cm, strong to extreme SW wind, freezing level high around 1000 m. 

Tuesday: A mix of sun and cloud with lingering flurries in the morning, strong NW wind easing through the day, freezing level high around 1200 m.

Wednesday: A mix of sun and cloud, moderate to strong SW wind, freezing level high around 1500 m.

Avalanche Summary

No new avalanches have been reported in the past few days but observations have been very limited. 

If you are getting out in the backcountry, please consider sharing your observations to the Mountain Information Network.  

Snowpack Summary

As of Sunday afternoon, many weather stations were showing 40-50 cm of new storm snow accumulation. This storm snow has buried a widespread, supportive melt-freeze crust. Strong southwest wind will be redistributing this new snow in exposed high elevation terrain forming touchy wind slabs. Lower elevations are expected to continue to see wet snow or rainfall, and wet loose avalanche should be expected. 

The middle and lower snowpack are generally strong and well bonded.

Terrain and Travel

  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Make conservative terrain choices and avoid overhead hazard.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.

Problems

Storm Slabs

An icon showing Storm Slabs

Heavy snowfall is expected to continue to build touchy storm slabs on Monday and a natural avalanche cycle is expected. The storm snow may be failing on a hard, underlying melt-freeze crust or on interfaces within the storm snow.  

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Very Likely

Expected Size

1.5 - 3

Loose Wet

An icon showing Loose Wet

Rain at lower elevations will destabilize the upper snowpack. Loose wet avalanches are most likely at elevations where rain soaks recent snowfall overlying a hard melt-freeze crust, or the crust completely breaks down. 

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2.5

Valid until: Apr 4th, 2022 4:00PM