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Avalanche Forecast

Archived

Jan 11th, 2022–Jan 12th, 2022

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

Regions

South Coast.

Avoid avalanche terrain, stay warm and dry until the storm has passed. Heavy rain and warm temperatures will continue to saturate the snowpack creating prime conditions for wet loose avalanches.

Confidence

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

Weather Forecast

The storm continues, a more intense front moves over the region bringing heavy rain and wind.

TUESDAY NIGHT: 30-80 mm of rain overnight with freezing levels at 2000 m. Strong southwest winds. 

WEDNESDAY: Heavy rain continues with 30-70 mm and freezing levels around 2500 m. Strong southwest winds. 

THURSDAY: The front exits leaving clearing skies and no precipitation expected. Freezing levels rise from 2000m to 2500m over the day, with light easterly winds. 

FRIDAY: Partly cloudy with no precipitation expected. Strong southwest winds return. Freezing levels 2300m. 

Avalanche Summary

A widespread natural avalanche cycle is expected to occur at all elevations with the heavy rain, snow and wind with rising temperatures over Tuesday and Wednesday. 

Small loose wet avalanches failing on the melt-freeze crust were reported on Sunday. and Monday. 

Snowpack Summary

50-80 mm of precipitation fell mostly as rain in this region creating a saturated upper snowpack sitting over a melt freeze crust observed to 2000 m. Expect the surface snow to have little cohesion and slide easily on the crust below. 

Around 150 to 200 cm deep, a thin and hard melt-freeze crust may sit above sugary faceted grains that formed during the cold spell in late December. Reports suggest that the snowpack may be bonding well to these layers.

The middle and base of the snowpack are strong, consisting of well-bonded snow and various hard melt-freeze crusts.

Terrain and Travel

  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.
  • If triggered loose wet avalanches may step down to deeper layers resulting in larger avalanches.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.