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Avalanche Forecast

Apr 11th, 2024–Apr 12th, 2024
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Recent snow and strong wind have formed wind slabs on lee features in the alpine.

If the sun pokes out beware of warming on solar slopes.

Confidence

High

Avalanche Summary

On April 10, a size 2 Deep Persistent Slab was observed on the NW bowl of Andromeda, pulling a slab to ice above the bergschrund.

Snowpack Summary

Up to 10cm of recent snow has been redistributed by South to SW winds in the Alpine. Solar slopes and all aspects at tree line and below have a plethora of crusts in the upper snow pack. The Feb 3 PWL is down 40-100cm and remains a concern on shaded aspects above 2400m. The basal depth hoar/facets are gaining strength in deeper snowpack areas.

Weather Summary

Mountain Weather Forecast is available at Avalanche Canada

Friday

Cloudy with sunny periods. Ridge wind west: 15-30 km/h. Freezing level: 2100m.

Saturday

Cloudy with sunny periods. Ridge wind west: 15 km/h gusting to 40 km/h. Freezing level: 2300m.

Sunday

Cloudy with sunny periods and isolated flurries. Mostly light ridge wind occasionally gusting to 35 km/h. Freezing level: 2400m.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

Avalanche Problems

Wind Slabs

Wind slabs have formed on previous hard surfaces (sun crusts and old wind slabs) from recent moderate to strong winds. These will likely need some time to bond.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

This problem seems to be most active where the March 19th crust is not supportive over the Feb 3rd weak layer (down 30-90cm) of facets over a crust. This problem remains a concern on shaded aspects above 2400m.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3.5