Avalanche Forecast
Issued: Dec 9th, 2014 4:34PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Deep Persistent Slabs and Loose Wet.
ian jackson,
Avalanche Canada
Warm temperatures and rain below 2000m will destabilize a weak early season snowpack. Ice climbers in particular should stay out of gully features especially at low elevations.
Summary
Weather Forecast
Warm temperatures, strong winds and up to 30 mm of precip with freezing levels to 2000m over on Wednesday and Thursday. Friday will bring cooler temperatures and lighter winds with less precipitation.
Snowpack Summary
Warmer daytime temperatures are promoting settlement of the upper snowpack and creating more of a slab over the basal facets/ rain crust especially in wind affected areas. The lower half of the snowpack is poorly structured, with facets (Nov 24th) below the recent storm snow, thin crusts (Nov 6th) below this, and then depth hoar near the ground.
Avalanche Summary
No new avalanches seen in the Little Yoho region today.
Confidence
Problems
Deep Persistent Slabs
The primary problems in the snowpack are the Nov. 6th and 24th facet/crust interfaces. These layers are most reactive in alpine/ treeline areas where the wind has slabbed up the surface snow.
- Be aware of the potential for full depth avalanches due to deeply buried weak layers.
- Use conservative route selection, choose moderate angled and supported terrain with low consequence.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Warm temperatures and rain will increase avalanche activity especially at lower elevations and in gully features.
- Choose ice climbs that are not exposed to avalanches from above.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Dec 10th, 2014 4:00PM
