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Avalanche Forecast

Archived

Feb 12th, 2023–Feb 13th, 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 possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
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

Vancouver Island, East Island, North Island, South Island, West Island.

Keep an eye on conditions that change with elevation and wind exposure. Reactive wind slabs likely exist in wind exposed terrain at treeline and above.

Confidence

Moderate

Avalanche Summary

On Friday explosives and ski cutting produced wind slab avalanches up to size 1.5. These avalanches were on northerly aspects at treeline.

Snowpack Summary

warm temperatures and rain on Sunday created moist surfaces at treeline and below. As freezing levels fall a new crust will form above 1400m. New snow and wind will likely form slabs above this crust.

The mid and lower snowpack contains multiple crusts but is generally well settled.

Weather Summary

Sunday Night

Mostly cloudy with up to 15cm of new snow expected. Moderate southwest winds and a low of -3 at 1500m.

Monday

A mix of sun and cloud with flurries bringing around 5cm of new snow. Moderate to strong westerly winds and temperatures at 1500m falling to -6.

Tuesday

A mix of sun and cloud with no new snow expected. Light to moderate northwest winds and a high of -7 at 1500m.

Wednesday

Mostly cloudy with light flurries bringing a few centimeters of new snow. Light to moderate southwest winds and a high of -4 at 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful to keep storm day fever from luring you out into bigger terrain features.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

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.