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Avalanche Forecast

Archived

Mar 14th, 2024–Mar 15th, 2024

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

Regions

Haines Pass.

Continued snowfalls will keep the danger elevated.

Avoid alpine terrain during periods of heavy loading from new snow or wind.

Confidence

Moderate

Avalanche Summary

No recent avalanche has been reported, but field observations are limited. Natural avalanche activity likely occurred during the storm on Thursday. If you head into the backcountry, please submit your observations to the Mountain Information Network.

Snowpack Summary

Thursday, the region received 15-20 cm of new storm snow. Moderate to strong wind has likely formed deeper, more reactive deposits in leeward terrain. This overlies soft snow, wind-affected or wind-scoured surfaces. A weak layer of faceted crystal or surface hoar found 65-80 cm deep remains a concern. The midpack is generally facetted to ground.

The average snowpack depth at treeline is around 150 cm.

Weather Summary

Thursday Night

Cloudy with isolated flurries expected. 40 to 50 km/h southwest ridgetop wind. Treeline temperatures around -8 °C.

Friday

Cloudy with 15 to 20 cm of new snow expected. 30 to 50 km/h south ridgetop wind. Treeline temperatures around -3 °C.

Saturday

Cloudy with 5 cm of new snow expected. 50 to 60 km/h southwest ridgetop wind. Treeline temperatures around +2 °C. Freezing level rising to 1500 m.

Sunday

Cloudy with 5 to 10 cm of new snow expected. 40 to 50 km/h southwest ridgetop wind. Treeline temperatures around +1 °C. Freezing level around 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid exposure to overhead avalanche terrain during periods of heavy loading from new snow, wind or rain.
  • Stick to non-avalanche terrain or small features with limited consequence.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.

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.