Avalanche Forecast
Issued: Jan 9th, 2015 4:01PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs, Storm Slabs and Wind Slabs.
snow safety,
Avalanche Canada
Touchy buried surface hoar and widespread propagation indicate the need to avoid avalanche terrain for a little while.
Summary
Weather Forecast
Moderately colder weather accompanied by cloud and a few flurries will only slowly heal the weaknesses in the snowpack.
Snowpack Summary
Continuous widespread Whumphing in Yoho today indicates the surface hoar on the raincrust problem down 45cm has not changed significantly since the last storm. Wide propagation indicates good slab formation even below treeline. Areas of windslab overlying weak facets near ridgetops and on exposed alpine areas are prone to failure.
Avalanche Summary
No natural activity was noted today.
Confidence
Problems
Persistent Slabs
The Dec 18 layer of surface hoar and crust is now buried 50-70 cm and primed for human triggering. Avoid any areas where avalanches can start at treeline and above.
- Whumpfing is direct evidence of a buried instability.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Storm Slabs
Storm slab formation has been limited due to light winds but gullies and large open slopes at treeline and above are best avoided for a few more days..
- If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
- If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.
- Be careful with wind loaded pockets
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 10th, 2015 4:00PM
