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Archived

Avalanche Forecast

Apr 12th, 2022–Apr 13th, 2022
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
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Assess for slab formation and the bond to the underlying crust before committing to large terrain features. Treat the danger as a step higher if you find 30+ cm of fresh snow.

Confidence

Moderate - Uncertainty is due to how quickly the snowpack will recover and gain strength.

Weather Forecast

TUESDAY NIGHT: Cloudy with snowfall, accumulation 5 to 15 cm, 30 km/h southeast wind, treeline temperature -5 C.

WEDNESDAY: Mostly cloudy with no precipitation, 10 to 20 km/h east wind, treeline temperature -3 C, freezing level rising to 1100 m.

THURSDAY: Mix of sun and cloud with no precipitation, 10 to 20 km/h east wind, treeline temperature -3 C.

FRIDAY: Cloudy with snowfall, accumulation 5 to 10 cm, 10 to 20 km/h southeast wind, treeline temperature -3 C.

Avalanche Summary

No recent avalanches were observed in the region. Looking forward, riders could trigger new wind and storm slabs that formed Tuesday and into the night. The new snow may not bond to the underlying crust or hard surfaces (see this MIN) and could slide easily. Best to stay well back of cornices too, as they are very large at this time of year.

Observations are limited at this time of year, so please consider posting to the Mountain Information Network.

Snowpack Summary

Anywhere from 10 to 40 cm of snow is likely to have accumulated by Wednesday morning, with associated easterly wind. Wind slabs may have formed in lee terrain features at higher elevations and storm slabs in areas sheltered from the wind. The snow sits on a hard melt-freeze crust or hard snow. Remember that cornices are very large at this time of year.

The remainder of the snowpack is strong, consisting of hard snow and various melt-freeze crusts.

Terrain and Travel

  • Don't be too cavalier with decision making, storm slabs may remain sensitive to human triggering.
  • Carefully evaluate steep lines for wind slabs.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Storm Slabs

New storm and wind slabs likely formed from Tuesday's snowfall. This snow may not bond well to the underlying crust or hard snow. Assess for slab properties and bonding prior to committing to large terrain features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2