Avalanche Forecast

Archived

Apr 6th, 2015–Apr 7th, 2015

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

Glacier.

Weather Forecast

High pressure ridge is settled in over the Province and will keep a steady pattern until later this week. Increasingly cloudiness is expected today with freezing levels rising to 1600m and light alpine winds. Tomorrow will clear up again. Gradual rise in freezing levels throughout the week with warmer overnight temperatures.

Snowpack Summary

Overnight crust refreeze at the surface below 2300m. Multiple crusts in the top 1.0m of the snowpack. Dry snow can still be found above 2300m. The mid and lower snowpack are well settled.

Avalanche Summary

2 natural size 2.0 slab avalanche yesterday within the highway corridor

Confidence

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.