Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 25th, 2021–Dec 26th, 2021

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

Regions

Northwest Coastal.

Don't let your guard down at lower elevations. Strong outflow at all elevations mean wind slab could be reactive even in lower terrain.

Confidence

High -

Weather Forecast

.

Saturday night: no new snow expected and a low of -25 at 900m. Moderate to strong outflow winds at all elevations.

Sunday: sunny with no new snow expected. Winds will be moderate to strong outflow at all elevations. High of -25 at 900m.

Monday: light snow in the morning with moderate north winds in the alpine. high of -20 at 900m.

Tuesday: some light flurries possible with moderate north winds. High of -16 at 900m.

Avalanche Summary

Loose dry avalanches up to size 1.5 in steep terrain continue to be reported in the region. Some wind slabs up to size 2 were observed on Friday on west aspects.

Snowpack Summary

Moderate to strong outflow winds at all elevations have scoured east aspects and formed wind slab on west aspects.

A new surface hoar layer was buried on Tuesday, it is not a problem yet.

The December 18th surface hoar/facet layer is down 30cm, the surface hoar was observed up to 12mm in both the treeline and below . It is likely only a problem in isolated locations in the treeline where wind slab has formed above it.

The December 7 persistent weak layer is now typically down 100cm and has not produced avalanches in over a week.

Snowpack depths vary greatly across the region, expect to find anywhere from 100-300 cm of snow around treeline.

Terrain and Travel

  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Loose avalanches may start small but they can grow and push you into dangerous terrain.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for wind slab hazard before you commit to it.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.

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.