Avalanche Forecast
Issued: Mar 28th, 2021 4:56PM
The alpine rating is Wind Slabs and Loose Dry.
, the treeline rating is , and the below treeline rating is Known problems includeConrad Janzen,
Up to 35 cm of storm snow is expected accompanied by strong winds. Monday is a day to travel cautiously and investigate how the new snow is bonding to the previous surfaces. Choose more conservative terrain with low consequences to gather more info.
Summary
Weather Forecast
Another 10-15 cm of snow at treeline is forecast Sunday night with alpine winds dropping down to the moderate range and switching from SW to North. Treeline temperatures will fall to the -12 C to -18 C range overnight and stay cool on Monday. Some light flurries and light to moderate NW winds are expected on Monday.
Snowpack Summary
Up to 25 cm of snow at treeline on Sunday in some areas. New wind slabs in alpine and exposed treeline areas from strong to extreme S-SW winds. 20-50+ cm now sits over the March 19 interface of crust on solar aspects and facets on north aspects. Moist snow below 1500 m. Snowpack becoming isothermal below 1300 m.
Avalanche Summary
One natural size 2.5-3 came down the Mt Stephen path into the berm near Field. Small loose wet avalanches reported in the Field area below 1500 m. Some small wind slabs above treeline reported by local ski areas, and some sluffing in steep terrain reported on the 93N. Limited visibility in the alpine all day.
Confidence
Problems
Wind Slabs
Widespread wind slab development in alpine and some exposed treeline areas is expected from strong to extreme SW winds and 10 to 35 cm of new snow. Use caution in any steep or loaded terrain until you have a sense for how reactive the new snow is.
- Use caution in lee areas. Recent wind loading have created wind slabs.
- Be careful with wind loaded pockets, especially in steep confined alpine terrain.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Dry
The new snow will sluff easily in steep terrain, especially in areas that received the largest amounts over the past 24 hours.
- Be careful of loose dry power sluffing in steep, confined or exposed terrain.
- On steep slopes, pull over periodically or cut into a new line to manage sluffing.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 29th, 2021 4:00PM