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Avalanche Forecast

Archived

Jan 3rd, 2023–Jan 4th, 2023

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Carefully assess your line for wind slab. Wind slabs are likely still rider triggerable in steep terrain.

Confidence

Moderate

Avalanche Summary

Several natural loose dry avalanches were reported on Monday. These avalanches were up to size 1.5 and released in steep terrain.

Please continue to post your observations and photos to the Mountain Information Network.

Snowpack Summary

Ongoing southerly winds have scoured south facing terrain and created wind slab on northerly terrain features. around 50cm overlies a rain crust formed in late December.

The mid-snowpack is well-settled. The lower snowpack consists of several crusts with weak faceted crystals above and below that are beginning to heal and bond to each other.

Snowpack depths are roughly 140 to 180 cm at treeline.

Weather Summary

Tuesday night

trace amounts of new snow expected. Light to moderate southerly winds and a low of -7 at 1800m.

Wednesday

A mix of sun and cloud with the possibility of light flurries bringing trace amounts of new snow. Moderate easterly winds and temperatures at 1800m around -7.

Thursday

Cloudy with flurries bringing trace amounts of new snow. Moderate to strong southeast winds and freezing levels rising to 1400m.

Friday

Cloudy with flurries bringing up to 5cm of new snow. Strong southerly winds. Freezing level around 1600m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Use ridges or ribs to avoid areas of wind loaded snow.

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.