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Archived

Avalanche Forecast

Apr 11th, 2025–Apr 12th, 2025
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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: Pine Pass.

Storm slabs are expected to remain reactive to human triggers, especially in wind loaded features

Watch for clearing skies; even brief periods of sun may trigger natural avalanches.

Confidence

Moderate

Avalanche Summary

The last avalanche activity reported was on Tuesday, where a size 2 naturally triggered wet loose avalanche was reported from a northeast alpine face.

Looking forward, we expect new slabs to be reactive to human triggers.

Snowpack Summary

Storm snow totals reach 30 cm in areas around Pine Pass, overlying dry snow on high north-facing slopes and over a crust elsewhere. The upper snowpack is generally moist, with a crust from last week's rain event.

Below treeline elevations hold isothermal snow.

A persistent weak layer from early March is buried 50–100 cm deep, as surface hoar on sheltered north and east alpine slopes. No recent avalanches have been reported, it remains a concern for triggering under heavy loads or as a potential step-down layer.

Weather Summary

Friday Night

Mostly cloudy with possible flurries. 40 to 60 km/h west ridgetop wind. Freezing levels drop to 1000 m.

Saturday

Mix of sun and cloud. 30 gusting to 40 km/h northwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1500 m.

Sunday

Mostly clear skies with 30 km/h west ridgetop winds. Treeline temperature 0 °C. Freezing level 1800 m.

Monday

Mix of sun and cloud. 30 to 50 km/h southwest ridgetop winds. Treeline temperature 0 °C. Freezing level 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Storm Slabs

Storm slabs will be most reactive where they overly a smooth crust. Sun may moisten the snow surface and trigger slabs naturally.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2