Avalanche Forecast
Regions: Little Yoho.
A storm is forecast for Monday, but amount of snowfall is uncertain. In areas that receive 20 cm or more of snow, the danger may go to High.
Weather Forecast
A storm is forecasted for Monday that should bring up to 40 cm (model amounts vary). Temperatures will be mild, but freezing levels are forecast to stay below 1400m. Winds will be in the strong range from the West. Tuesday/ Wednesday look to be cold, clear and calm.
Snowpack Summary
Strong winds over the last few days has created widespread windslabs in the alpine and in some treeline areas. These overly facets in many places, producing moderate to hard test results. The Dec. 2 crust and facets are anywhere from 130 cm deep in thicker parts, and half that depth in thinner snowpack areas such as Mt. Stephen and Mt. Dennis.
Avalanche Summary
This past week, 2 significant skier triggered avalanches occurred on the Dec 2 persistent layer. No new avalanches were observed or reported on Sunday.
Confidence
Timing, track, or intensity of incoming weather system is uncertain
Avalanche Problems
Wind Slabs
New snow and wind on Monday will add to previous windslabs in alpine and treeline terrain. In some areas these have been enough to initiate deeper layers in the snowpack.
- Minimize overhead exposure during periods of heavy loading from new snow, wind.
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood: Possible - Likely
Expected Size: 1 - 2.5
Persistent Slabs
This problem represents both the Dec. 2nd crust/ facet layer (treeline and below) and layers of faceted snow that were formed during the late December cold snap (all elevations). If triggered, either layer could result in large avalanches.
- Forecasters are operating with alot of uncertainty at this time.
Aspects: All aspects.
Elevations: All elevations.
Likelihood: Possible - Likely
Expected Size: 2 - 3