Avalanche Forecast
Issued: May 1st, 2017 4:00PM
The alpine rating is Loose Wet, Deep Persistent Slabs and Cornices.
, the treeline rating is , and the below treeline rating is Known problems includeThis is the last scheduled bulletin for Little Yoho region. Refer to the Banff, Yoho & Kootenay bulletin for current conditions.
Summary
Weather Forecast
Snowpack Summary
A spring snowpack exists with multiple melt freeze crusts on solar aspects. Dry snow may be found only on the highest north aspects. A basal weakness remains at the bottom of the snow pack. It is currently only reactive to large triggers like cornices but may wake up with solar warming.
Avalanche Summary
Check the Banff, Yoho & Kootenay National Parks bulletin for recent avalanche observations.
Confidence
Problems
Loose Wet
Loose wet avalanches can be expected on solar aspects in the afternoon when the day warms up.
- Pay attention to sluffing off cliffs and steep solar terrain, signs of a warming snowpack.
- If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.
Aspects: North, North East, East, South East.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
The weak basal facets can produce large avalanches with large triggers or heat. Remember that the snowpack is generally strongest in the morning when it is cool.
- Pay attention to overhead hazards like cornices which could easily trigger the deep persistent slab.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Cornices
Cornices are large and will fall off at some point this spring. These large triggers have been enough to trigger the deep persistent layer. Be especially careful of these on warm afternoons.
- Pay attention to overhead hazards like cornices which could trigger the deep persistent slab.
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: May 2nd, 2017 4:00PM