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Avalanche Forecast

Archived

Jan 19th, 2024–Jan 20th, 2024

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

Regions

Yukon, Tutshi, Wheaton, White Pass East, White Pass West.

Exposed terrain has been heavily wind hammered, but there remain pockets of windslab that could be human triggered. Find sheltered terrain for the best snow.

Confidence

Moderate

Avalanche Summary

Reports are limited, but our field team reported one size 1.5 naturally triggered windslab avalanche that they suspect failed Wednesday during a period of intense wind loading.

Snowpack Summary

Moderate to strong winds continue to form wind slabs on all aspects and at all elevations. Wind slabs are especially prevalent on south facing alpine terrain. In isolated areas sheltered from the wind, you may find up to 10 cm of soft snow on the surface.

The middle of the snowpack is settled and strong.

Weather Summary

Friday Night

Clear, no new snow expected, northeast alpine wind up to 40 km/h, treeline temperature -20 °C.

Saturday

Mix of sun and cloud with increasing cloud in the afternoon, no new snow, northeast alpine wind up to 20 km/h, treeline temperature around -20 °C.

Sunday

Cloudy, up to 3 cm of new snow overnight and another 2 cm through the day, southerly alpine winds up to 20 km/h, treeline temperature -20 °C.

Monday

Cloudy, trace of new snow overnight and up to 5 cm through the day, south alpine wind up to 50 km/h, treeline temperature -18 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Approach lee and cross-loaded slopes with caution.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.

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.