Avalanche Forecast
Issued: Mar 10th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
zryan,
Avalanche Canada
Be cautious as you enter wind-affected terrain. Newly formed wind slabs are expected to bond poorly to the underlying crust.
Summary
Confidence
Avalanche Summary
On Wednesday, numerous size 1 loose dry avalanches were observed in the alpine. These avalanches were triggered by solar input during the day.
On Thursday, explosive control targeting cornices produced size 1-1.5 avalanches that did not pull slabs on the slopes below.
On Friday, fresh wind slab formation was observed as moderate to strong northeast wind redistributed the surface snow into immediate lees, as seen in this MIN report from the Fernie area.
Snowpack Summary
Up to 15 cm of low-density new snow overlies wind affected surfaces in the alpine and a sun crust on solar slopes.
The mid-snowpack is generally well settled. The lower snowpack includes a layer of weak sugary crystals near the ground. These facets are slowly gaining strength and have not produced recent avalanche activity. We continue to track the layer and watch for any signs that it could wake up and produce very large avalanches.
Weather Summary
Friday night
Mainly cloudy with flurries, 2-8 cm of accumulation. Alpine temperatures drop to a low of -13 °C. Ridge wind light from the northeast. Freezing level at valley bottom.
Saturday
A mix of sun and cloud with isolated flurries. Alpine temperatures reach a high of -5 °C. Ridge wind light from the southwest. Freezing level rises to 600 meters.
Sunday
A mix of sun and cloud. Alpine temperature reach a high of -2 °C. Ridge wind 15 to 45 km/h from the southwest. Freezing level rises to 1300 meters.
Monday
Cloudy with mixed precipitation, 10-15 cm of new snow accumulation at higher elevations. Alpine temperatures reach a high of 2 °C. Ridge wind 30 to 60 km/h from the southwest Freezing level rises to 1800 meters.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Be especially cautious as you transition into wind affected terrain.
- Wind slabs may be poorly bonded to the underlying crust.
Problems
Wind Slabs
Friday's northeast wind and 5-15 cm of new snow are expected to have formed small but reactive wind slabs most likely found on southwest-facing slopes. Wind slabs may bond poorly to the underlying crust.
Aspects: East, South East, South, South West, West, North West.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 11th, 2023 4:00PM
