Avalanche Forecast
Issued: Mar 30th, 2017 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs, Cornices and Loose Wet.
snow safety,
Avalanche Canada
Danger ratings in this area are primarily based upon the forecast of higher solar input. Start early and watch locally for sun effect. SH
Summary
Weather Forecast
Lots of solar input and freezing levels to 2000m Friday. There will be mainly light winds and no new snow. Temperatures will stay warm with a slight temperature inversion Saturday and a cooling trend for Sunday.
Snowpack Summary
15-25 cm of recent storm-snow sits which was turning moist Friday, sits on a well settled mid-pack. In shallow areas (eg: Field ice climbs) the base is weak and facetted and shears persist on this interface. In deeper areas (eg: Little Yoho Valley), the snowpack is settled with the deeper weak layers being less of a concern.
Avalanche Summary
Some loose, wet slides out of steep solar terrain in the alpine today on Mt. Field. No other avalanches noted.
Confidence
Problems
Persistent Slabs
The snowpack is stabilizing after last week's cycle, and now we are left with a classic low probability, high consequence problem. Natural avalanches have mostly ceased, but triggering is still possible - especially from large loads like cornices.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
There has been an increasing frequency of cornice failures this past week. Be wary of this as we transition into spring (cornice season).
- Pay attention to overhead hazards like cornices which could easily trigger the deep persistent slab.
- Extra caution needed around cornices with current conditions.
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Loose Wet
A decent freeze is possible in the Little Yoho region, but the forecast for clearing skies will heat up solar aspects as we transition slowly into spring.
Aspects: North, North East, East, South East, South.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 31st, 2017 4:00PM
