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Avalanche Forecast

Archived

Mar 2nd, 2022–Mar 3rd, 2022

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

Regions

Northwest Coastal.

Pay attention to warming temperatures at all elevations as this will destabilized the upper snowpack and result in increased avalanche danger. 

Confidence

Moderate -

Weather Forecast

  

Wednesday night: Mostly cloudy. 5-10cm of new snow. Light winds from the south. A high of +2°C and a low of -2°C in the alpine. Freezing levels rising to 1100m

Thursday: A mix of sun and clouds. No precipitation. Light winds from the south. A high of 0°C and a low of -5°C for the alpine. Freezing levels around 1000m. 

Friday: A mix of sun and clouds. No precipitation. Light winds from the south changing to north later in the day. A high of +5°C and a low of -2°C for the alpine. Freezing levels rising to 1000m

Saturday: Mostly sunny. No precipitation. Light to moderate north winds. A high of +3°C and a low of -8°C for the alpine. 

Avalanche Summary

Isolated, storm slab, skier cut avalanches to size 1 were reported in the area yesterday. 

Numerous small loose wet avalanches at lower elevations were also reported. 

Snowpack Summary

20-40cm of Storm snow is settling into a slab with warming temperatures. Below 1200m the upper snowpack is moist in most areas. The mid-February crust is now buried 40-60cms and while we have not observed avalanches on this layer, it continues to draw suspicion.

The lower snowpack is being effectively bridged by the mid-February crust and avalanches are not expected to be triggered below this layer at this time. 

Terrain and Travel

  • Watch for changing conditions today, storm slabs may become increasingly reactive.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Watch for unstable snow on specific terrain features, especially when the snow is moist or wet.

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.

Wet Slabs

Wet Slab avalanches are the release of a cohesive layer of snow (a slab) that is generally moist or wet when the flow of liquid water weakens the bond between the slab and the surface below (snow or ground). They often occur during prolonged warming events and/or rain-on-snow events. Wet Slabs can be very unpredictable and destructive.