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Avalanche Forecast

Archived

Mar 10th, 2023–Mar 11th, 2023

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

Regions

Long Range Mountains, Corner Brook, Gros Morne, Northern Peninsula.

Overnight snow and strong northerly wind have formed fresh, reactive wind slabs.

Confidence

High

Avalanche Summary

Recent observations have been limited to small pockets of old wind slab lingering on easterly aspects. Crowns and debris remain visible from last week's wind slab avalanche cycle up to size 2.

Snowpack Summary

5-10 cm of new snow arrived overnight with strong northerly winds. The fresh snow sits over crusts and wind-hardened surfaces.

The mid snowpack is composed of mainly dense, wind affected snow with a few crust layers. The lower snowpack is dense and well bonded from warm temperatures, rainfall and subsequent refreezing.

Weather Summary

Friday night

5-10 cm of new snow. Strong northerly wind. Alpine temperature -5.

Saturday

Cloudy with a risk of freezing drizzle. Moderate northeasterly wind, easing. Alpine high -1.

Sunday

A mix of sun and cloud. Light northerly wind. Alpine high -2.

Monday

Mostly sunny. Light northerly wind. Alpine temperature -5.

Tuesday

A mix of sun and cloud. Light variable wind. Alpine temperature -5.

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.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Avoid freshly wind loaded terrain features.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.

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.