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Avalanche Forecast

Archived

Apr 12th, 2015–Apr 13th, 2015

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Kootenay Boundary.

There is little or no new information about snow and avalanche conditions in the region. Check out this blog post for more information on a cool and snowy spring scenario.

Confidence

Poor - Due to the number of field observations

Weather Forecast

Monday: Cloudy with a chance of flurries. The freezing level bumps up to 2000 m. Winds are moderate gusting strong from the S-SW. Tuesday: Periods of snow – around 5-15 cm. The freezing level lowers to 1500-1600 m and wind shift to the W-NW. Wednesday: A mix of sun and cloud. The freezing level rises to 1800 m during the day and winds are light.

Avalanche Summary

Only minor pinwheeling and loose snow slides have been observed in the past couple days. Observations are becoming more limited as we enter into spring. If you're out in the mountains, please consider posting your observations to our webpage using the Mountain Information Network.

Snowpack Summary

Melt-freeze surface conditions exist on sun-exposed slopes. On shaded slopes, 10-20cm of recent snow overlies a thick supportive melt-freeze crust. At higher elevations these accumulations have been blown into  thin wind slabs, primarily on N-NE aspects. The mid-March crust/facet complex is buried around 50cm below the surface. This layer is generally considered dormant, although it could be reactivated in isolated terrain by prolonged warm temperatures. The mid and lower snowpack are strong and well settled.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.