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Avalanche Forecast

Archived

Mar 10th, 2022–Mar 11th, 2022

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

Regions

South Coast.

Hazard is trending upward as stormy conditions return to the region.

Confidence

High - We are confident the likelihood of avalanche will increase with the arrival of the forecast weather.

Weather Forecast

THURSDAY NIGHT: Cloudy with no precipitation, 20 km/h northwest wind, treeline temperature -4 C, freezing level 500 m.

FRIDAY: Cloudy with snowfall, accumulation 5 to 10 cm, 40 km/h southwest wind, treeline temperature -3 C, freezing level 500 m.

SATURDAY: Cloudy with snowfall, accumulation 20 to 30 cm, 40 km/h southwest wind, treeline temperature -2 C.

SUNDAY: Cloudy with snowfall, accumulation 15 to 25 cm, 20 km/h southwest wind, treeline temperature -2 C.

Avalanche Summary

No recent avalanches were reported. Avalanche activity will increase in the coming days as new slabs form. The snow may remain quite reactive if it doesn't bond well to the melt-freeze crust.

Snowpack Summary

New snow will accumulate with strong southwest wind, forming wind slabs in exposed terrain features at higher elevations. The snow will fall onto a hard melt-freeze crust on all aspects up to 1500 m and to the mountain tops on sun-exposed slopes. The snow will fall onto variable wind-affected snow on northerly aspects above 1500 m.

A few other melt-freeze crusts are found in the top 100 cm of the snowpack but appear to be progressively bonding.

The remainder of the snowpack is well-bonded.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Watch for avalanche hazard to increase throughout the day.
  • Cornices often break further back than expected; give them a wide berth when traveling on ridgetops.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.