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Avalanche Forecast

Archived

Apr 24th, 2023–Apr 25th, 2023

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Cariboos, North Rockies, Blue River, McBride, Premier, Quesnel, Sugarbowl, Clemina, North Monashee, Kakwa, McGregor, Pine Pass, Renshaw, Robson, Tumbler.

Be diligent in making ongoing assessments. This time of year conditions and hazard will vary greatly from one slope to another and can change quickly throughout the day.

If in doubt choose more conservative terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the past few days in the region.

Please help out your fellow backcountry users by filling out a Mountain Information Network report.

Snowpack Summary

In the alpine dry snow can still be found on north facing terrain. In the morning dry snow may be found on south facing terrain but it will quickly become moist when the sun pokes out. At treeline a crust over moist snow will likely be found in the morning but it will quickly break down with day time warming. Below treeline the snowpack is diminishing quickly, moist or wet snow will be found at this elevation.

Several crusts can be found in the upper snowpack on solar aspects and on all aspects at treeline and below. The mid and lower-snowpack is strong. However, the November depth hoar remains at the base of the snowpack and remains a concern in rocky, shallow, variable depth snowpack areas at treeline and above.

Weather Summary

Monday Night

Cloudy with a few mm of precipitation expected, rain turning to snow overnight as freezing levels fall to 900 m. Moderate southwest winds.

Tuesday

A mix of sun and cloud with up to 5 cm of new snow expected. Light to moderate westerly winds and freezing level rising to 1900 m.

Wednesday

A mix of sun and cloud with up to 10 mm of precipitation possible, rain at treeline and below with snow in the alpine. Moderate to strong westerly winds and freezing level rising to 1700 m in the north of the region and 2500 m in the south.

Thursday

A mix of sun and cloud with no new precipitation expected. Moderate to strong westerly winds and freezing level rising to 1800 m in the north of the region and 2500 m in the south.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation and sun exposure.
  • Investigate the bond of the recent snow before committing to your line.
  • Be carefull around freshly wind loaded features.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.
  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.