Avalanche Forecast
Issued: Mar 9th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
Darren Vonk,
A small refresh of snow is forecasted for tomorrow. This will bury sun crusts on solar aspects up in to tree line. As we start the transition in to the spring season. Timing is very important. Plan accordingly and finish early.
Summary
Weather Forecast
Wednesday will see up to 5cm of snow with moderate winds.
Thursday will be a mix of sun and cloud with cold lows -18 warming to -8 during the day
Snowpack Summary
High solar input have created crusts and moist snow on solar aspects at TL and below. Continuing SW winds have extensively redistributed the snow pack at TL and ALP. The mid pack is supportive in deep areas, but shallow snowpack areas are weak and failing on buried facet layers in test results.
Avalanche Summary
Field teams down south today noted no new avalanche activity today.
Confidence
Problems
Wind Slabs
New snow and wind will build fresh wind slabs that overlie previous wind slabs. This all sits on top of the Feb 20th facet interface.
- If triggered the wind slabs may step down to deeper layers resulting in large avalanches.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
Caution in thin facetted snowpack areas where triggering is more likely. This is a low probability but high consequence problem.
- Avoid shallow snowpack areas where triggering is more likely.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 10th, 2021 4:00PM
