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Avalanche Forecast

Archived

Dec 6th, 2015–Dec 7th, 2015

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

South Rockies.

We're working with almost no field observations right now, if you're out in the mountains please share what you're seeing via the Mountain Information Network. (MIN)

Confidence

Low - Due to the number of field observations

Weather Forecast

A series of Pacific storms continue to impact the southern half of the province, but little if any of that precipitation is expected to make it into the South Rockies. Freezing levels are expected to rise from their already high position to over 2500m Tuesday afternoon. SUNDAY NIGHT: Freezing Level 1500m, 0 to 8cm of snow, strong SW winds. MONDAY: Freezing level rising to around 1800m, 2 to 15cm of snow possible, moderate SW winds. TUESDAY: Freezing level forecast to rise to 2500m. 0 to 3mm of precipitation falling as rain below 2500m. Strong to extreme SW winds. WEDNESDAY: Freezing level lowering from 2500m to 1500m. 5 to 20 cm of snow possible with strong SW winds.

Avalanche Summary

No recent avalanches have been reported. If you are out in the mountains, please post your observations to the Mountain Information Network.

Snowpack Summary

Conditions are looking pretty lean in the South Rockies at the moment. Around 20 cm of snow has fallen in the last week accompanied by strong SW winds. Below the new snow you'll find the old surface which consists of crust above treeline and a combination of loose faceted snow/surface hoar at and below treeline. Total snow depth above treeline is between 100 and 150cm. Below treeline depths reportedly drop off quickly. Several rain crust layers exist within the snowpack; the late-November crust is 10 to 25cm below the surface and the mid-November crust should be 30 to 60cm below the surface. Snowpack tests have shown easy shears failing in a facet layer below the mid-November crust. We're receiving very little information from the region, so please consider sharing your observations via the Mountain Information Network.

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.