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Archived

Avalanche Forecast

Apr 24th, 2025–Apr 25th, 2025
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
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
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

Regions: Haines Pass.

Around 10 to 20 cm of snow may overly various weak layers. Assess for slab formation and use particular caution in any consequential terrain.

Confidence

Moderate

Avalanche Summary

We haven't received recent reports of avalanche activity.

Last weekend, the reports here and here describe recent large avalanches that released on buried weak layers on northerly alpine terrain.

Looking forward, we suspect that slabs forming over surface hoar crystals on northerly aspects could be reactive to human traffic. It also remains possible to trigger large avalanches on northerly alpine terrain.

Please share your observations to the MIN!

Snowpack Summary

Around 10 to 20 cm of recent snow overlies surface hoar crystals on shaded aspects and a melt-freeze crust at lower elevations and on sun-exposed slopes. Recent strong wind may have formed deeper deposits in lee terrain features.

We have limited snowpack information, but this report suggests a generally weak lower snowpack with various potential layers of concern, which recently produced large avalanches.

Weather Summary

Thursday Night

Cloudy with 1 to 3 cm of snow. 30 to 40 km/h southeast ridgetop wind. Treeline temperature -4 °C. Freezing level 500 m.

Friday

Cloudy with 1 to 3 cm of snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

Saturday

A mix of sun and clouds. 10 km/h south ridgetop wind. Treeline temperature -1 °C. Freezing level 1100 m.

Sunday

Cloudy with 1 to 3 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 1200 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 aware of the potential for large avalanches due to buried weak layers.
  • Make observations and continually assess conditions as you travel.
  • Cornice failures could trigger large and destructive avalanches.

Avalanche Problems

Storm Slabs

New slabs may have formed from recent snow and strong wind. These slabs will be particularly touchy where they rest on weak surface hoar crystals on shaded aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Large avalanches released on buried weak layers in northerly alpine terrain last weekend. Similar avalanches could be triggered going forward.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 3