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

Jan 13th, 2019–Jan 14th, 2019

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

Regions

Glacier.

Hazard will increase with rising temperatures throughout the day. Watch for slab development and moist surface snow and be prepared to alter your objective with changing conditions.

Weather Forecast

The sun will shine today with a temperature inversion and above freezing temperatures in the alpine. No precipitation and ridge winds light with gusts to 25km/h. The weak temperature inversion (and above freezing temps in the alpine) is expected to remain until Tuesday. A low pressure system and the associated cold snow arrives Wednesday.

Snowpack Summary

Warm temperatures have caused recent storm snow to settle out into soft slabs at all elevations. Isolated wind slabs exist in the alpine in exposed areas and near ridge lines. The Jan 2 freezing rain crust is down ~90cm. The Nov 21st interface is now 1-2m in deep. The expected arrival of above freezing temperatures will accelerate slab development.

Avalanche Summary

Several loose dry and small slab avalanches to size 1.5 released naturally in rocky and treed areas on steep solar aspects.

Confidence

Freezing levels are uncertain

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.

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.