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Avalanche Forecast

Archived

Apr 3rd, 2023–Apr 4th, 2023

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Cariboos, McBride, Premier, Quesnel, Sugarbowl, Renshaw, Robson.

Watch for signs of slab instability like shooting cracks or fresh avalanches, and use extra caution around slopes that are being warmed by the sun.

Be ready to change plans with the potential for quick changes in the weather.

Confidence

Moderate

Avalanche Summary

No new avalanches reported in the last couple of days.

On Saturday, west of Valemount, several naturally triggered, small (size 1-1.5) Loose Dry avalanches were reported in steep terrain.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network). You can share riding conditions, avalanche or snowpack observations, or even just a photo. Heck, share what you had for lunch if that was the most eventful thing that happened:)

Snowpack Summary

10-20 cm of mostly soft snow is settling over a widespread, thin crust except north facing high alpine slopes, where it sits on old, faceted surfaces.

The mid-snowpack is generally strong.

Below treeline, expect to find around 5cm of moist snow over a series of crusts, possibly supportive to the weight of a human.

There continues to be a weak layer of facets from November at the base of the snowpack. This layer remains a concern in rocky, shallow, or thin to thick snowpack areas at treeline and above.

Weather Summary

A generally convective weather pattern will mean that on Tuesday we'll see spotty areas of cloud and light snowfall, or quick bursts of intense snowfall, but it also might be sunny, and everything could change at the drop of a hat.

Monday Night

Mostly clear. No new snow expected. Light north ridgetop wind. Freezing level falling to valley bottom. Treeline low around -7°C.

Tuesday

Mostly sunny, increasing cloud in the afternoon. Possible trace of snow expected. Light variable ridgetop wind. Freezing level rising to 1300 m. Treeline high around -3°C.

Wednesday

Mix of sun and cloud. No new snow expected. Light to moderate southwest and south ridgetop wind. Freezing level at valley bottom in the morning, rising to 1500 m.

Thursday

Mostly cloudy. 0-3 cm of snow expected. Strong south ridgetop wind, trending to southwest at higher elevations. Freezing level at valley bottom in the morning, rising to 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.