Avalanche Forecast

Issued: Apr 5th, 2024 1:45PM

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

Avalanche Canada mkoppang, Avalanche Canada


Windslabs in alpine terrain should be expected near cols and crests of features. The thin snowpack also is a concern in terms of triggering the deep persistent slab problem. Temperatures have stayed warm overnight and as a result, refreezes have been very limited. Conservative terrain choices is a good way to manage the uncertainty within the snowpack right now. Hopefully we get a good overnight freeze soon!




Avalanche Summary

A few loose dry avalanches from steep terrain up to sz 1.5.

Snowpack Summary

20-40cm of recent snow (40cm on the eastern side of the range) is overlying a temperature crust that developed early in the week. This crust is being found up to 2300m and while supportive to skiing, its sitting on top of a generally moist snowpack. Crusts are common on the solar aspects but less so on the more polar sides. There are some isolated windslabs in alpine areas along ridgelines but this problem does not appear to be widespread. Thin weak areas are getting harder to determine and during a tour on Friday forecasters were getting moderate results in the basal facets from thin <1m areas at treeline. Recent snow combined with cloudy weather hasnt allowed the snowpack to get a significant refreeze that is common for spring time. Conservative terrain was the place to be for us on Friday.

An important thing to consider at this time of year is the Quality of the freeze overnight. Over the past 2 days, freezes have been generally poor with overnight lows only around -5C. Avalanche danger can change from low in the cool mornings to high in the hot afternoons. The timing of this change is important to monitor so plan you trips with these factors in mind.

Weather Summary

Not much of a change for Saturday. Cloudy skies will continue which will limit our re-freeze and only a trace of new snow is forecast on Saturday. Freezing levels will rise from the valley floor to 2000m throughout the day. Winds are generally forecast to be light. If the sun comes out, expect avalanche danger to quickly increase.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.


Wind Slabs

An icon showing Wind Slabs

Watch for windslabs on all aspects in alpine areas. These slabs will be more reactive where they are overlying a temperature crust.

Aspects: All aspects.

Elevations: Alpine.



Expected Size

1 - 2

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

Facets near the base of the snowpack may be triggered from thin areas and this season there are lots of thin areas. Dont try to outsmart the snowpack and stick to conservative terrain until we get into a good spring diurnal cycle.

Aspects: All aspects.

Elevations: All elevations.



Expected Size

1.5 - 3

Valid until: Apr 7th, 2024 3:00PM