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Avalanche Forecast

Archived

Feb 25th, 2024–Feb 26th, 2024

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal, Northwest Inland, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Kispiox, Ningunsaw, Ningunsaw, Ningunsaw.

Ease into terrain cautiously and watch for signs of instability in the recent snow.

Confidence

Moderate

Avalanche Summary

Natural, rider, and remotely triggered wind slab avalanches size 1-2 were reported throughout the region over the last two days. Most were on north aspects at treeline and above. The failure plane has been predominantly facets under the recent storm snow, but in some cases slabs ran on a buried crust with crowns 50 to 100 cm deep.

Snowpack Summary

20 to 50 cm of new snow sits over predominantly faceted and wind-affected surfaces, as well as surface hoar in wind-sheltered terrain.

A thick crust that formed in late January is now buried 50 to 100 cm deep. It has been a problematic layer for step-downs in wind-loaded areas.

Below, the mid and lower snowpack is generally well-bonded and strong.

Weather Summary

A clearing and cooling trend to start the week. Colder end of forecast temperature ranges are for areas north of Stewart.

Sunday night

Snow tapering, up to 5 cm. 20 to 40 km/h west ridgetop wind shifting north. Treeline temperature -10 to -18 °C.

Monday

A mix of sun and cloud. 10 to 20 km/h northeast ridgetop wind. Treeline temperature -10 to -16 °C.

Tuesday

Mostly cloudy with 5-10 cm of snow. 30 to 50 km/h south ridgetop wind. Treeline temperature -10 to -16 °C.

Wednesday

Mostly cloudy with flurries bringing up to 5 cm. 20 to 40 km/h south ridgetop wind. Treeline temperature -8 to -12 °C.

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 carefull around freshly wind loaded features.
  • Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.