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Archived

Avalanche Forecast

Mar 8th, 2024–Mar 9th, 2024
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
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: Tutshi, Wheaton, White Pass East, White Pass West, Yukon.

Recent snowfall combined with strong winds may be forming reactive new slabs.Use extra caution when entering wind-affected terrain.

Confidence

Moderate

Avalanche Summary

On Wednesday, a large (size 2) avalanche was reported on a north aspect in the alpine. It is suspected to have failed on a layer of surface hoar that has been preserved in isolated areas. See photo below. Field observations have been limited, if you're out in the backcountry please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

Up to 20 cm of recent snow covers old, firm, wind-affected or crusty surfaces. Moderate to strong forecast southerly winds will likely form deeper deposits of fresh, reactive wind slab that may not stick well to the old surface. In isolated areas buried surface hoar can be found 20 to 40 cm deep.

Below 1500 m, a thick melt-freeze crust is buried 50 to 100 cm deep.

The mid-pack is generally strong and bridges the weak crystals at the base of the snowpack.The average snowpack depth at treeline is around 200 cm.

Weather Summary

Friday Night

Cloudy. 2 to 8 cm of snow expected. 50 km/h south ridgetop wind. Treeline temperature around -7 °C.

Saturday

Cloudy. 2 to 7 cm of snow expected. 30 to 45 km/h southwest ridgetop wind. Treeline temperature around -5 °C.

Sunday

Mostly cloudy. 0 to 3 cm of snow expected. 20 to 30 km/h southeast ridgetop wind. Treeline temperature around -6 °C.

Monday

Mostly cloudy. 2 cm of snow expected. 30 km/h south ridgetop wind. Treeline temperature around -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Use ridges or ribs to avoid areas of wind loaded snow.
  • Carefully evaluate steep lines for wind slabs.

Avalanche Problems

Wind Slabs

Fresh snow and moderate to strong southerly winds may be forming reactive new slabs. Watch for visible wind transport, and signs of instability like shooting cracks.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2