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Avalanche Forecast

Archived

Apr 15th, 2023–Apr 16th, 2023

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Continually assess conditions as you gain elevation. At lower elevations wet loose avalanches are likely, as you ascend above the snowline wind slab avalanches become more likely.

Confidence

Moderate

Avalanche Summary

Several small wet loose avalanches were observed in the region on Friday.

If you are venturing into the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

A new crust can be found at or near the surface on all but high north facing terrain. Rider triggerable wind slab could still be found in the alpine on west through east aspects.

Several crusts or moist layers can be found in the upper snowpack. A well settled snowpack exists below.

Weather Summary

Saturday Night

Cloudy with flurries bringing a few cm of new snow. Strong southerly winds and freezing level around 1200 m.

Sunday

Stormy with around 10 cm of new snow expected at higher elevations. Moderate to strong southerly winds and freezing levels rising to 1900 m with the snowline around 1600 m.

Monday

Mostly cloudy with up to 5 cm of new snow expected. Moderate southeast winds and freezing level rising to 1700 m.

Tuesday

A mix of sun and cloud with a few cm of new snow possible. Light to moderate southerly winds and a High of -5°C at 1800 m.

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.
  • Minimize your exposure time below cornices.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.