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Avalanche Forecast

Archived

Mar 19th, 2024–Mar 20th, 2024

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

Regions

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

Continue to assess for wind slabs in exposed, alpine terrain features.

Confidence

Moderate

Avalanche Summary

A group of skiers remote-triggered a size 2 avalanche on a wind-loaded convex roll in the Wheaton area on Sunday. Check out the associated MIN here.

If you go into the backcountry, please submit your observations to the Mountain Information Network.

Snowpack Summary

A widespread surface crust likely exists up to roughly 1500 m.

At higher elevations recent snow has been redistributed by winds from various directions. Deeper deposits of wind slabs can be found in exposed terrain.

In some areas, a weak layer of facets or surface hoar may persist, down approximately 50 to 80 cm from the surface.

Weather Summary

Tuesday Night

Partly cloudy. 10 to 30 km/h northeast ridgetop wind. Treeline temperature -3 °C.

Wednesday

Partly cloudy. 10 to 30 km/h north ridgetop wind. Treeline temperature -4 °C.

Thursday

Partly cloudy. 10 to 30 km/h north ridgetop wind. Treeline temperature -6 °C.

Friday

Partly cloudy. 0 to 20 km/h variable ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Carefully evaluate steep lines for wind slabs.
  • 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.