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Avalanche Forecast

Archived

Mar 10th, 2023–Mar 11th, 2023

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

Regions

South Coast, Garibaldi, Powell River, North Shore, Sasquatch, Sasquatch, Sky Pilot, Tetrahedron.

Continually assess new snow amounts throughout the day. If more than 20 cm of new snow is observed expect reactive storm slabs.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported in this region over the past few days.

We expect rider triggerable storm slabs will form throughout the day on Saturday.

Snowpack Summary

Up to 25 cm of new storm snow is expected with southeast winds. This new snow will fall over a crust on solar aspects and at lower elevations, it may not bond well.

In general the mid and lower snowpack is well settled and bonded.

Weather Summary

Friday Night

Cloudy with up to 10 cm of new snow expected. Light southerly winds and a low of -5°C at 1500 m.

Saturday

Cloudy with flurries bringing up to 15 cm of new snow. Moderate southeast winds and a high of -3°C at 1500 m, freezing level rising to 1100 m.

Sunday

Mostly cloudy with light flurries bringing around 5 cm of new snow. Moderate southeast winds and freezing levels rising to 1200 m.

Monday

Stormy with up to 80 mm of precipitation falling as snow at treeline and above. Strong southerly winds and freezing level rising to 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Closely monitor how the new snow is bonding to the crust.

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.