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Avalanche Forecast

Archived

Apr 5th, 2024–Apr 6th, 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, human triggered possible.
Below Treeline
Below Threshold.

Regions

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

Fresh wind slabs that may be sensitive to human triggering will develop through Saturday with incoming precipitation and wind. Watch for changing conditions throughout the day.

Confidence

High

Avalanche Summary

No new avalanches were reported on Thursday.

Please consider sharing photos and observations from your day on the Mountain Information Network.

Snowpack Summary

Up to 10 cm of new snow sits atop various surfaces at higher elevations, including firm wind-affected surfaces, hard crusts, and loose powder snow (primarily in sheltered north-facing terrain).

Large, fragile cornices can be found on exposed ridgelines and should be given a wide berth.

Below 1300 m new snow overlies a widespread melt-freeze crust.

Weather Summary

Friday Night

Cloudy with 0 to 5 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Saturday

Mostly cloudy with 0 to 5 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -8°C.

Sunday

Cloudy with 5 to 10 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy with 4 to 10 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.