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

Dec 5th, 2015–Dec 6th, 2015

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

Regions

Sea To Sky.

Danger ratings will continue to be high with the incoming storm and precipitation.  Practice conservative travel techniques.  If you take observations, consider sharing them through the MIN

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

A strong southwest flow will bring Pacific moisture into the area through the middle of next week. The first major storm to reach the BC Coast arrives today, and will spread inland with a persistent mild southwest flow. Each successive system will bring warmer air and freezing levels will rise to 1700m on Sunday afternoon, dropping briefly Tuesday morning then rise again to 2300m by Tuesday afternoon.

Avalanche Summary

Reports of loose wet natural avalanches at lower elevations and numerous explosive controlled storm slabs up to size 2.5

Snowpack Summary

Deep storm slabs have developed in the alpine and at treeline above a variety of old surfaces that includes wind crusts, melt-freeze crusts, and weak facetted crystals in some areas. Shallow facetted areas at treeline may now be buried by 70-100 cm of wind transported new snow. Cooler temperatures have re-frozen the moist or wet snow at lower elevations into a solid base layer.

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.