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Archived

Avalanche Forecast

Apr 4th, 2025–Apr 5th, 2025
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
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
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

Get an early start and aim to wrap up your day early.

If you're heading to high north-facing terrain for dry powder, steer clear of wind-loaded slopes and overhead hazards.

Confidence

Moderate

Avalanche Summary

On Wednesday a small (size 1) wet loose avalanche cycle was observed on steep south aspect terrain

On Tuesday, a naturally triggered size 3 and a cornice triggered size 2.5 persistent slabs were reported on northerly aspects in the alpine near Blue River.

There have been several recent cornice falls triggering very large persistent slabs in this region.

NOTE: Observations in this region are currently very limited.

Snowpack Summary

On the surface, up to 20 cm of recent snow exists on northerly aspects in the alpine. Solar aspects and lower elevations will sport a crust or moist snow.

Below this, a 5 to 25 cm variable strength crust from last week's rain event is present. This is capping a moist upper snowpack.

The primary weak layer of concern is a surface hoar, facet, and crust layer from early March, buried 60 to 120 cm deep.

The lower snowpack is generally well-settled and strong in most areas.

Weather Summary

Friday Night

Mostly clear. 5 to 15 km/h northwest ridgetop wind. Treeline temperature rising to 0 °C. Freezing level rising to 2000 m.

Saturday

Mostly sunny. 15 to 30 km/h southwest ridgetop wind. Treeline temperature rising to +1 °C. Freezing level rising to 2200 m.

Sunday

Increasing cloud cover. 30 to 50 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level rising to 2500 m.

Monday

Increasing cloud cover. 30 to 50 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level rising to 2500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cornice failures could trigger large and destructive avalanches.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Avalanche Problems

Persistent Slabs

Very large natural persistent slab avalanches have recently been reported, primarily on northerly aspects in the alpine.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Wind Slabs

Up to 20 cm of recent snow has formed slabs in wind-loaded areas at upper elevations. These slabs have been most reactive where they overlie a crust.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

Wet loose avalanches are likely on steep solar slopes when the sun is strong.

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

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 1.5