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Avalanche Forecast

Mar 26th, 2024–Mar 27th, 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
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
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Boundary, East Stikine, Ningunsaw, Northwest Coastal, Stewart, West Stikine.

Carefully evaluate bigger terrain features before committing to them.Human triggering remains a concern with buried persistent weak layers.

Confidence

Moderate

Avalanche Summary

Monday, a few glide slab avalanches were observed in the Iskut area.

Sunday, several loose wet avalanches were observed on steep sunny slopes, ranging from small to large (size 1 to 2).

Saturday, three very large (size 3) persistent slab avalanches were observed in the north of the region. They occurred on south-facing alpine slopes and were likely triggered by daytime warming.

Snowpack Summary

A skiff of new snow may overlie a thick widespread crust. At lower elevations, the crust may soften with warming during the day or the snowpack may be may be isothermal.Dry powder snow still exists on high north-facing alpine slopes and a weak layer of surface hoar is developing in sheltered terrain at treeline and above.

Various weak layers, including crusts, facets, and/or surface hoar exist approximately 40 to 80 cm deep. An additional crust and facet layer may be found 100 to 150+ cm below the surface. Lingering concern remains for human-triggering on these persistent weak layers.

Weather Summary

Tuesday Night

Mostly cloudy with 0 to 4 cm of new snow. 20 km/h southwest ridgetop wind. Treeline temperature drops to around -3°C.

Wednesday

A mix of sun and cloud. 20 km/h east ridgetop wind. Treeline temperature around 1 °C. Freezing level rising to 1400 m.

Thursday

Partly cloudy. 20 km/h east ridgetop wind. Treeline temperature around 0 °C. Freezing level rising to 1200 m.

Friday

Partly cloudy. 10 km/h west ridgetop wind. Treeline temperature around 0 °C. Freezing level rising to 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Keep in mind that human triggering potential persists as natural avalanching tapers off.

Avalanche Problems

Persistent Slabs

Avoid shallow or variable depth snowpacks in the alpine and treeline where triggering a persistent weak layer is more likely.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3.5