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Avalanche Forecast

Archived

Apr 25th, 2019–Apr 26th, 2019

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

Regions

Cariboos.

Lingering wind slabs may still be reactive to human triggers; especially on lee features below alpine ridgetops.

Confidence

Low - Due to the number of field observations

Weather Forecast

THURSDAY NIGHT: Few clouds / Light, northwesterly winds / Alpine low -5 C / Freezing level 1300 m.

FRIDAY: Cloudy with isolated flurries; 0-3 cm. / Light, southwesterly winds / Alpine high -2 C / Freezing level 1700 m.

SATURDAY: Cloudy with flurries; 3-5 cm. / Moderate, northerly winds / Alpine high -4 C / Freezing level 1400 m.

SUNDAY: Sunny / Light, northwesterly winds / Alpine high 0 C / Freezing level 1600 m.

Avalanche Summary

On Wednesday, a naturally triggered size 2.5 storm slab avalanche was reported on a west aspect at 2400 m. with a crown depth of 100 cm. This avalanche may have been older than 24 hrs.

There are currently very few professional observers submitting daily observations. Please submit your observations to the MIN. Photos of avalanches or current conditions are particularly useful.

Snowpack Summary

5-10 cm. of new snow sits on a crust everywhere except high north facing terrain. Wind slabs created by last weeks storm may still linger in lee terrain below ridgetops. A layer of surface hoar (weak, feathery crystals) in the upper snowpack could still be reactive to human triggers in isolated locations such as high elevation, north facing terrain.

Below treeline, snow is disappearing rapidly.

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.