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Archived

Avalanche Forecast

Apr 8th, 2021–Apr 9th, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Coast.

Snowfall amounts may vary significantly across the region, in areas that see less than 15 cm of new snow on Friday, the danger is likely moderate.

In areas receiving heavy snowfall, storm slabs are expected to become increasingly reactive throughout the day.

Confidence

Moderate - Forecast snowfall amounts are uncertain.

Weather Forecast

Thursday night - Cloudy with clear periods / moderate southwest wind / alpine low temperature near -5 / freezing level 500 m

Friday - Snow, 20-25 cm / strong southwest wind / alpine high temperature near -2 / freezing level 900 m

Saturday - A mix of sun and cloud / light to moderate northwest wind / alpine high temperature near -4 / freezing level 1000 m 

Sunday - Mainly sunny / light northwest wind / alpine high temperature near -1 / freezing level 1600 m

Avalanche Summary

Fresh storm slabs are expected to build and become increasingly reactive throughout the day.

We haven't received many observations for the South Coast region in the past few days. If you get out, please consider sharing your observations to the Mountain Information Network to help us know what conditions are like.

Snowpack Summary

20-25 cm of new snow is expected to fall on Friday, bringing this week's storm snow total to about 30-40 cm. Strong southwest winds are expected to accompany the new snow, likely forming fresh and reactive slabs in many areas. 

The recent storm snow sits on a crust on sun-exposed aspects, and on all aspects below about 1400 m. It likely fell on either wind slabs or soft snow on north aspects above 1400 m.

Cornices are large and looming along ridgelines. Their release is unpredictable, requiring a large berth if you're travelling above or below them.

Terrain and Travel

  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Choose conservative terrain and watch for clues of instability.
  • Watch for changing conditions today, storm slabs may become increasingly reactive.

Avalanche Problems

Storm Slabs

20-25 cm of new snow with strong southwest wind is expected during the day on Friday, likely forming slabs that may become increasingly reactive throughout the day.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Cornices

Cornices are large and looming along many ridgelines and have likely grown with the recent snow and wind. 

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 3