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

Mar 6th, 2022–Mar 7th, 2022

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

Regions

Little Yoho.

After a few stunning days without the west winds, they returned Sunday afternoon and should usher in  cloud and a touch of snow for Monday. With diminished solar input the sensitivity of the persistent slab should diminish but keep it in mind...

Weather Forecast

A low pressure system is set to sweep down through Alberta from the NW Sunday night.. this will bring increased clouds in the morning and light snow in the afternoon. Freezing levels should just reach valley bottom and the clouds should keep solar heating at bay however expect westerly winds to continue to build into Monday morning.

Snowpack Summary

30-40 cm of snow has solidified into a slab overlying the February 16 sun crust on steep southerly aspects. Solar heating has created new crusts on steep solar slopes. Westerly winds returned Sunday to create light wind effect on alpine slopes.

Avalanche Summary

Forecasters in the Chickadee and Boom valleys today saw evidence of slab activity on steep solar slopes: a sz 2.5 Na likely initiated Saturday right at treeline and may have reached Boom Lake while a sz 2 moist slab initiated with solar heating in one of the Chickadee paths just below the rocks at treeline to wipe out several sets of tracks...

Confidence

Timing or intensity of solar radiation is uncertain on Monday

Problems

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.