Avalanche Forecast
Issued: Mar 11th, 2023 11:30AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Loose Wet.
ahanna,
Avalanche Canada
Recently formed wind slabs may remain reactive. With beautiful weather in the forecast this week, watch for signs of warming on solar aspects.
Summary
Confidence
Avalanche Summary
We are expecting fresh wind slabs to be small but reactive this weekend. Watch the MIN for reports of recent wind slab activity.
Prior to the weekend, recent observations were limited to small pockets of old wind slab lingering on easterly aspects. Older crowns and debris may remain visible from a wind slab cycle the first week of March.
Snowpack Summary
5-10 cm of recent snow sits over crusts and wind-hardened surfaces. At wind exposed elevations, the recent snow has likely seen some wind effect from previous moderate northerly wind.
The mid snowpack is composed of mainly dense, wind affected snow with a few crust layers. The lower snowpack is dense and well bonded from warm temperatures, rainfall and subsequent refreezing.
Weather Summary
Saturday night
Clear. Moderate northeasterly wind, easing. Alpine low -9 C.
Sunday
A mix of sun and cloud. Light northerly wind. Alpine high -5.
Monday
A trace of snow overnight then clearing to mostly sunny. Light northerly wind. Alpine high -2.
Tuesday
Mostly sunny. Light northerly wind. Alpine high -2.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
- Minimize exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
- Cornices become weak with daytime heating or solar exposure.
Problems
Wind Slabs
5-10 cm of new snow over the weekend has likely been wind loaded into leeward terrain features by previous moderate northerly wind. Wind slabs may be especially reactive where they sit over a crust.
Aspects: East, South East, South, South West, West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Loose wet avalanches are most likely on steep or rocky solar aspects when the sun is strong or temperatures are warm. A moist or wet snow surface and pinwheeling are indicators of increasing potential for loose wet avalanches.
Aspects: South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 14th, 2023 11:30AM
