Avalanche Forecast

Issued: Apr 7th, 2023 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is moderate. Known problems include Deep Persistent Slabs, Loose Wet and Wind Slabs.

Avalanche Canada CB, Avalanche Canada


The mediocre spring weather will continue one more day ahead of a significant system arriving Sunday. There is a lot of variability in the conditions across our region, and with the variety of avalanche problems out there, evaluate all aspects of your planned trip carefully.




Avalanche Summary

Don't forget to post avalanche observations to the MIN.

Snowpack Summary

The surface snow is moist up to 2000m on all aspects. Moderate to strong winds have redistributed the dusting of new snow from last week. Under this there is a sun crust at all elevations on solar aspects, with mixed facets on polar aspects. The mid-pack consists of multiple layers of dense wind effected snow, sun crusts, and facets. Depth hoar and basal facets make up the base of the snowpack.

Weather Summary

Strong southwesterly flow aloft continues on Saturday. Scattered flurries with 2-4 cm of accumulations. Ridgetop winds will be from the southwest near 40-50 km/h. Freezing levels will rise to near 2000 m by the afternoon. Alpine temperatures will rise to 0⁰C to 5⁰C.

Terrain and Travel Advice

  • If triggered loose wet avalanches may step down to deeper layers resulting in larger avalanches.
  • Use caution on large alpine slopes, especially around thin areas that may propagate to deeper instabilities.


Deep Persistent Slabs

An icon showing Deep Persistent Slabs

The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. Likely triggers are cornices and smaller avalanches, and human triggering remains possible in thick to thin snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.


Unlikely - Possible

Expected Size

2 - 3.5

Loose Wet

An icon showing Loose Wet

Avoid exposure to steep terrain if the surface snow is wet, or there are signs of instability like pinwheeling. Weak overnight freezes, warm temperatures, and possibly some rain will keep this problem active.

Aspects: All aspects.

Elevations: Below Treeline.



Expected Size

1 - 2

Wind Slabs

An icon showing Wind Slabs

Strong south west winds have formed thin wind slabs on lee and cross-loaded features. Use caution as you transition into wind effected terrain.

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

Elevations: Alpine.


Possible - Likely

Expected Size

1 - 1.5

Valid until: Apr 8th, 2023 4:00PM