Avalanche Forecast
Issued: Jan 19th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs, Deep Persistent Slabs and Cornices.
mmueller,
Avalanche Canada
Temperatures jumped to -5 today on the Spray Road. Unlike people, it takes the snowpack a day or so get used to the change and sort itself out. In the early stages of the warm spell approach big terrain with caution, especially if it hasn't avalanched lately.
Summary
Confidence
Weather Forecast
Temperatures will continue to rise, with a daytime high of -5 tomorrow. No snow. 40km/hr winds valley bottom with alpine winds around 60km/hr. The wind direction will be SW.
Avalanche Summary
One sz 2.5 was seen in the Ranger Creek drainage. The exact age is unknown, but it appeared fresh.
Snowpack Summary
The winds picked up last night and immediately built new windslabs in the alpine & treeline areas. All eastern aspects have soft slabs that feel hollow. No whumphing or cracking was observed, but we limited our exposure to the higher and windier areas today. A profile at treeline had a snow depth of about 2m with the Dec 31 layer down about 40cm. The deep persistent layer was about 20cm thick and made up of depth hoar and facets.
Terrain and Travel
- Avoid exposure to overhead avalanche terrain as temperatures increase.
Problems
Wind Slabs
There are new slabs being formed as you read this. Keep in mind there are also buried windslabs that might be lingering below the new slabs. This interface could be problematic given it formed when the snow was cold.
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
The warming trend and localized loading will make this layer easier to trigger. Minimize exposure to large terrain that hasn't previously slid.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
With rising temps, cornices may weaken and potentially trigger the deeper layers.
Aspects: North, North East, East, South East, South.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Jan 20th, 2020 4:00PM
