Avalanche Forecast

Issued: Mar 9th, 2024 4:00PM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is considerable. Known problems include Persistent Slabs and Storm Slabs.

trettie, Avalanche Canada

Northwest Coastal, East Stikine, Howson, Ningunsaw, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, West Stikine.

Choose conservative, low consequence terrain.

Storm slabs will remain rider triggerable and have the potential to step down to deeper layers.

Summary

Confidence

Moderate

Avalanche Summary

Rider and remotely triggered persistent slab avalanches continue to occur in the region. Some have been triggered in low angle terrain.

Snowpack Summary

Ongoing snowfall and southerly winds have formed reactive storm and wind slabs.

Several persistent weak layers are likely buried between 70 and 150 cm deep. These weak layers include hard crusts with overlying weak facets and surface hoar. Avalanches continue to fail on these layers.

Weather Summary

Saturday Night

A mix of cloud and clear skies with 1 to 3 cm of new snow. 10 to 20 km/h south alpine wind. Treeline temperature -4°C.

Sunday

Cloudy with 5 to 15 cm of new snow. 40 to 70 km/h southeast alpine wind. Treeline temperature -1°C.

Monday

Cloudy with up to 5 cm of new snow. 40 to 70 km/h southeast alpine wind. Treeline temperature -3°C.

Tuesday

Cloudy with 20 to 30 cm of new snow. 30 to 60 km/h southwest alpine wind. Treeline temperature -4°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Remote triggering is a big concern, be aware of the potential for wide propagations and large, destructive avalanches at all elevations.
Caution required around non obvious avalanche terrain like road cutbanks, cutblocks and other non obvious avalanche terrain
Storm slabs in motion may step down to deeper layers resulting in large avalanches.
Be especially cautious as you transition into wind affected terrain.

Problems

Persistent Slabs

Persistent weak layers including crust/facet combos and buried surface hoar continue producing surprising avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

2 - 3

Storm Slabs

Ongoing snowfall and southerly wind have formed reactive storm slabs. The largest and most reactive will be on northerly aspects.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2

Valid until: Mar 10th, 2024 5:00PM