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Archived

Avalanche Forecast

Mar 10th, 2021–Mar 11th, 2021
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Wind slabs remain a concern at upper elevations. Watch for denser, deeper drifts near ridge-crests and rollovers.

Minimize your exposure to cornices and sun-exposed slopes during the heat of the day.

Confidence

Moderate - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

WEDNESDAY NIGHT - Mainly clear with cloudy periods and a few flurries / light northeast wind / alpine low temperature near -2 

THURSDAY - Mainly sunny / light northwest wind / alpine high temperature near -1 / freezing level 1200 m

FRIDAY - Cloudy with sunny breaks / light to moderate west wind / alpine high temperature near 2 / freezing level 1800 m

SATURDAY - Mainly sunny / moderate south wind / alpine high temperature near 5 / freezing level 2500 m

Avalanche Summary

There were no new avalanches reported on Tuesday.

On Monday, there were a few size 1 natural wet loose avalanches reported.

Over the weekend, there were reports of numerous storm slabs releasing 20 cm deep in the recent storm snow across all aspects between 1700-2000 m. Small dry loose sluffs were also observed in steep terrain. 

Snowpack Summary

20-60 cm of snow from the past weekend has been redistributed by recent winds, forming wind slabs on leeward slopes at upper elevations, which may remain possible to trigger. Massive cornices exist on ridgelines, which can act as triggers on slopes below. Solar aspects likely have a crust on the surface.

Below the recent snow, the snowpack consists of a series of rain crusts and settled snow that is well-bonded. See this helpful MIN report from the Hollyburn area.

Terrain and Travel

  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
  • Minimize your exposure time below cornices.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet

Avalanche Problems

Wind Slabs

Recent winds have redistributed storm snow into wind slabs at upper elevations. Pay attention to the pattern of wind-drifting in the terrain where you are traveling and watch for cracking or changes in snow stiffness. 

Aspects: North, North East, East, South East, West, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 2.5