Avalanche Forecast
Issued: Jan 27th, 2018 4:06PM
The alpine rating is Storm Slabs, Deep Persistent Slabs and Cornices.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
High -
Weather Forecast
SUNDAY: 20-30 cm of new snow (rain below roughly 1200m) / Strong to extreme southwesterly ridgetop winds / Freezing level rising to around 1500m.MONDAY: 10-20 cm of new snow (rain below roughly 1500m) / Strong to extreme southwesterly ridgetop winds / Freezing level rising to around 1800m.TUESDAY: Cloudy with flurries; 3-5 cm / Strong southwesterly ridgetop winds / Freezing level dropping to around 700m.
Avalanche Summary
On Thursday, two natural storm slab avalanches stepped-down to facets at the bottom of the snowpack and resulted in 3-3.5 avalanches. They occurred on north and south aspects between 2000 and 2250 m. The extended period of continuous loading of the snowpack may begin to reactivate deeply buried weak layers resulting in large and destructive avalanches running full path.
Snowpack Summary
10 cm of new snow on Friday morning brings recent storm totals to 80-110cm. This weekend's storm will likely create dense storm slabs lurking in lee and cross-loaded features at treeline and above.90-120cm below the surface you'll likely find a few crusts that were buried during the first few weeks of January. Due to limited observations, not much is known about the current reactivity of these layers.The lower snowpack includes the mid-December crust layer. The load of the new snow may tip the balance and reactivate this layer in isolated terrain - particularly in the north of the region where it's shown prolonged reactivity in snowpack tests.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 28th, 2018 2:00PM