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Avalanche Forecast

Archived

Feb 28th, 2023–Mar 1st, 2023

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

Regions

Microwave-Sinclair, Telkwa.

Significant snowfall accumulation is to hit our region today and carry into the night.

Expect reactive storm slabs and use extra caution in wind-loaded terrain.

Confidence

Moderate

Avalanche Summary

Operators are still reporting natural and human-caused avalanches from storm slabs and wind slabs that were created during and since our last storm.

With incoming weather, expect more of these types of avalanches to be occurring.

Snowpack Summary

New storm snow today will be sitting on new and old wind slabs These wind slabs can be found on all aspects and at most elevations.

Up to 80 cm now sits over a layer of small surface hoar, facets, and wind-affected surfaces.

A crust from late January exists around 140 to 180 cm below the surface. Beneath the crust, the snowpack is generally consolidated but as you move further inland there are instabilities found near the ground where the snowpack is thinner.

The total height of snow varies between 450 cm near the coast and 250 cm further inland.

Weather Summary

Tuesday Night

Increasing clouds, trace accumulation, winds northwest 25 km/h switching to west 45 km/h by morning, treeline temperatures -8 ºC.

Wednesday

Cloudy, 20 to 25 cm accumulation more in coastal zones, winds southwest 30 km/h gusting to 60, treeline temperatures -10 ºC, and warming throughout the day.

Thursday

Cloudy, another 25 to 35 cm accumulation mostly arriving by morning, winds southwest 30 km/h gusting to 60, treeline temperatures, -7 ºC.

Friday

Clouds with late-day sunny breaks, 3 cm accumulation, winds southwest 30 km/h, treeline temperatures -8 ºC.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

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.