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Avalanche Forecast

Archived

Mar 13th, 2022–Mar 14th, 2022

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

Regions

Glacier.

New snow and strong winds will be forming reactive storm slabs.

Choose low consequence, manageable terrain and enjoy the fresh pow!

Weather Forecast

The snow continues to add up as a series of storms pass through the region with 40cm of snow so far.

10cm by Monday morning and another 10-15cm during the day. The freezing level will rise to 1500m with an alpine high of -5. Winds at ridge top will be 30-60km/hr from the South West.

Another 15-20cm by the end of the day on Tuesday.

Snowpack Summary

~40cm of storm snow covers a crust (March 11) up to 1500m on all aspects and up to tree line on solar aspects. The March 7 (surface hoar / crust) is buried ~50cm.The Feb 26 (surface hoar / crust) is down ~70cm. The Feb 15 surface hoar is down 90-130cm and decomposing.

Excellent snow quality in sheltered areas.

Avalanche Summary

On Saturday and Sunday skiers were triggering size 1.0 storm slab and dry loose avalanches in steeper terrain. As the snow continues to fall, expect the size and sensitivity of the storm slab to increase.

Several natural storm slabs up to size 2.5 out of steep terrain along the Eastern end of the highway corridor the last two days.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.