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Avalanche Forecast

Archived

Mar 8th, 2024–Mar 9th, 2024

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

Regions

Haines Pass.

Significant snowfall and strong winds are expected to form reactive slabs.Stick to conservative terrain and avoid overhead hazard until the new snow has had a chance to stabilize.

Confidence

Moderate

Avalanche Summary

Field observations have been limited due to road closures, if you're out in the backcountry please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

Up to 35 cm of combined new and recent snow is expected to fall by end of day Saturday. This snow covers old, firm, wind-affected or wind-scoured surfaces. Strong southeasterly winds will likely form reactive new slabs that may not bond well to the old surface.

The midpack is generally strong and bridges the weak crystals at the base of the snowpack.

Weather Summary

Friday Night

Cloudy. 10 to 18 cm of snow expected. 60 km/h southeast ridgetop wind. Alpine temperature around -4 °C.

Saturday

Cloudy. 3 to 4 cm of snow expected. 30 to 40 km/h southwest ridgetop wind. Alpine temperature around -2 °C.

Sunday

Cloudy. 2 to 8 cm of snow expected. 40 to 60 km/h southeast ridgetop wind. Alpine temperature around -3 °C.

Monday

Mostly cloudy. 3 to 4 cm of snow expected. 40 km/h southeast ridgetop wind. Alpine temperature around -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm snow and wind is forming touchy slabs. Use caution in lee areas in the alpine and treeline.
  • As the storm slab problem gets trickier, the easy solution is to choose more conservative terrain.
  • Be especially cautious as you transition into wind affected terrain.

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.