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Avalanche Forecast

Archived

Feb 21st, 2024–Feb 22nd, 2024

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

Be on the lookout for wind slab formation as both snowfall and wind intensify on Thursday.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported since last week.

Snowpack Summary

New snow is burying largely variable crusty and wind-affected snow surfaces at all elevations and on all aspects. New snow may sit atop weak surface hoar crystals in wind-sheltered terrain at treeline.

A surface hoar layer may be found down 20 - 60 cm in isolated north-facing terrain features.

Below 1500 m, a thick melt-freeze crust is buried 50 - 100 cm deep.

Weather Summary

Wednesday Night

Cloudy with 0 to 5 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday

Cloudy with 5 to 15 cm of snow. 60 to 80 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Friday

Mix of sun and cloud. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Saturday

Mostly cloudy with 2 to 5 cm of snow. 0 to 20 km/h variable ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Carefully evaluate steep lines for wind slabs.

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.