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Archived

Avalanche Forecast

Apr 4th, 2025–Apr 5th, 2025
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
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, Tutshi, Wheaton, White Pass East, White Pass West, Yukon.

Expect conditions to change with elevation, aspect and time of day due to melt-freeze cycles.

Reduce your time under cornices and watch for wet loose avalanches if the spring suns come out.

Confidence

Moderate

Avalanche Summary

Numerous wet avalanches were reported from steep, south-facing slopes in the alpine due to strong solar warming. On Monday, large persistent slabs were observed out of moraine features with shallow faceted snowpack outside the region.

Thanks for sharing your observations with the Mountain Information Network after a day in the backcountry.

Snowpack Summary

Wind has redistributed recent snow, forming pressed surfaces and wind slabs in open terrain while leaving 15-25 cm of settled snow in sheltered areas. Wind slabs may be more predominant on the east side of White Pass where the wind hit harder. A melt-freeze crust covers most solar slopes.

A buried surface hoar or crust layer, 40 to 60 cm deep, is variable in distribution. A December crust with facets, 100 to 150 cm deep on all aspects up to 1750 m, has shown no significant test results.

Snow depth ranges from 100 cm at highway elevations to over 300 cm in the alpine.

Weather Summary

Friday Night

Cloudy with 0 to 2 cm of snow. 30 to 60 km/h south ridgetop wind. Treeline temperature -3 °C.

Saturday

Cloudy with 0 to 5 cm of snow. 40 to 70 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.

Sunday

Cloudy with up to 5 cm of new snow. 40 to 60 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 m.

Monday

Cloudy with up to 5 cm of new snow. 40 to 60 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Loose Wet

If surfaces become wet or slushy and weak, loose wet avalanches will become more likely on steep south-facing slopes.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5