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Avalanche Forecast

Archived

Feb 18th, 2019–Feb 19th, 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.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Skier triggered and natural avalanches are still occurring in the Alpine on specific terrain features.

Weather Forecast

Mainly cloudy today, we should see an alpine high of -15, and light winds. Flurries tonight and into tomorrow with total accumulations of 5cm. No significant snow for the long term forecast either, as a High-Pressure system dictates our weather pattern for the foreseeable future.

Snowpack Summary

15cm of storm snow covers hard wind slabs in the alpine and exposed areas of tree line. In sheltered areas at and below tree line the storm snow is covering surface hoar and facets. The Jan 17 surface hoar is down 50-70cm at TL and below. the mid and lower snowpack is well settled and strong.

Avalanche Summary

Yesterday the sun triggered several size 1-2 loose dry avalanches on steep terrain features, on solar aspects in the alpine. Artillery control also produced avalanches to size 2.5 in steep North facing in the alpine. One group traveling up the Illecillewaet remote triggered a size 1 wind slab, and observed a natural size 2.5 on Glacier Crest(min).

Confidence

Due to the quality of field observations

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 Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.