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Avalanche Forecast

Archived

Mar 30th, 2023–Mar 31st, 2023

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

Regions

West Island.

Avalanche danger will increase throughout the day on Friday as new snow and wind will form unstable slabs at upper elevations.

Confidence

Moderate

Avalanche Summary

No recent avalanches have been reported on the west side of the island. On the east side of the island there have been reports of small wet loose avalanches on slopes facing the sun over the past few days. Storm and wind slabs will be the main concern as new snow accumulates.

Snowpack Summary

20 to 40 cm of new snow will fall on Friday, with deeper deposits in lee terrain. In most areas this snow is falling on moist or crusty snow layers, except shaded terrain above roughly 1600 m where the snow has remained dry over the past week. The middle and lower snowpack are strong and bonded.

Weather Summary

Thursday night

Cloudy, scattered flurries starting after midnight with 5 to 10 cm of snow, 40 to 50 km/h south wind, treeline temperatures around -4 °C with freezing level dropping to 400 m.

Friday

Flurries increasing in intensity in the afternoon, 20 to 40 cm of snow, 60 to 80 km/h south wind, treeline temperatures around -2 °C with freezing level around 400 m.

Saturday

Scattered flurries with 5 to 10 cm of snow, 30 km/h southwest wind, treeline temperatures around -2 °C with freezing level around 500 m.

Sunday

Scattered flurries with 5 cm of snow, light wind, treeline temperatures around -1 °C with freezing level around 600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for avalanche hazard to increase throughout the day.
  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.

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.