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Avalanche Forecast

Archived

Nov 26th, 2022–Nov 27th, 2022

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

Regions

Birkenhead, Duffey, South Chilcotin, Taseko.

Cautiously assess conditions as you travel - the fresh snow may hide reactive slabs or, more likely, early-season hazards.

Confidence

Low

Avalanche Summary

No new avalanches have been observed or reported in the region. Observations are limited at this time of year, if you head into the backcountry consider submitting a MIN report.

Snowpack Summary

Overnight snowfall covered wind-affected snow and crust at upper elevations and moist snow and dirt at treeline and below.

Where the snowpack is growing, a weak drought layer is down 20-50 cm. This layer consists of hard, wind-affected snow in the alpine, surface hoar or facetted snow in sheltered areas, and a crust on solar aspects and low elevations. Below this layer, several other facet-crust interfaces exist in the snowpack.

Terrain features poke through a building snowpack that ranges from 50-100 cm in the alpine and 40-60 cm at treeline. Most solar slopes and below treeline are below the threshold for avalanches.

Weather Summary

Saturday night

Snowfall and strong southwest winds will peak around midnight, then temperatures cool and winds begin to decrease. 10-20 mm precipitation overnight, alpine high -1 C, snow/rain line peaking around 1000 m.

Sunday

Up to 20 cm of new snow by morning and convective flurries possible throughout the day. Strong west wind decreasing to moderate, treeline temperatures dropping to -12 C, and freezing level dropping to valley bottom.

Monday

Cold and sunny with patchy clouds. Moderate northeast wind, treeline lows down to -14 C, and freezing level valley bottom.

Tuesday

Cold, with a mix of sun and cloud. Moderate southerly wind, treeline lows down to -16 C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Dial back your terrain choices if you are seeing more than 25cm of new snow.
  • Investigate the bond of the recent snow before committing to your line.

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.