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Avalanche Forecast

Archived

Feb 23rd, 2021–Feb 24th, 2021

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

South Coast.

Lingering wind slabs may remain reactive to human triggers in areas of the region with alpine terrain. Avoid lee and cross-loaded terrain.

Confidence

High -

Weather Forecast

  

TUESDAY NIGHT: Few clouds / Light, northeast ridgetop wind / Alpine low -8 / Freezing level 400 m.

WEDNESDAY: Mostly sunny / Light, west ridgetop wind / Alpine high 1 / Freezing level 700 m.

WEDNESDAY NIGHT: Snow; 15-20 cm. / Strong, southwest ridgetop wind / Alpine low -6 / Freezing level 500 m.

THURSDAY: Snow/rain; 5-10 mm. / Strong, northwest ridgetop wind / Alpine high 1 / Freezing level 900 m.

FRIDAY: Mix of sun and cloud / Moderate, northwest ridgetop wind / Alpine high 2 / Freezing level 900 m.

Avalanche Summary

No new avalanches were reported in this region on Monday.

Snowpack Summary

A hard crust now caps the snowpack up to the tops of the North Shore mountains. High elevation terrain in other parts of the region could have up to 50 cm of recent snow, likely heavily wind affected. However there are no observations to confirm alpine conditions.

Terrain and Travel

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • Be careful as you transition into wind affected terrain.
  • Extra caution is needed around cornices under the current conditions.

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.