Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Feb 26th, 2022–Feb 27th, 2022

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

Regions

Glacier.

Out of the deep freeze and back into the 'shred pow cycle' as a series of snow laden pulses approach the region.

Fresh wind slabs will likely be building throughout the day, driving the hazard up by the late afternoon.

Weather Forecast

A series of low pressures systems push into our region over the next few days. Snow begins Saturday night with accumulations of 5-10cm of snow by Sunday night. Sunday will be cloudy with snow flurries, have an alpine high of -7 and 30-50km/hr South West winds at ridge top. 30cm forecasted for Monday, 10cm for Tuesday and another 10cm on Wednesday.

Snowpack Summary

The forecasted new snow will bury wind affect at tree line and above, sun crust on steep solar aspects at all elevations and facetted surfaces everywhere else. The Feb 15 surface hoar/sun crust is down 30-70 cm and has not been reactive in tests or skier traffic in the past couple days, but may re-awaken with the new load and warming temps.

Avalanche Summary

Several reports of wind slabs avalanches from the last few days up to size 1.5.

A sz 2.5 out of Cougar Creek West on Saturday, likely a cornice triggered wind slab.

Confidence

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

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.