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Avalanche Forecast

Archived

Nov 23rd, 2015–Nov 24th, 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

Cariboos.

There are still a lot of gaps in our knowledge about the early season snowpack. If you get out to enjoy some of the great early season riding please submit any observations from your day to the MIN.

Weather Forecast

Light snowfall accompanied by moderate SW winds should continue through early Tuesday morning.  Very cold air descending from the Arctic will lead to clearing skies and cold temperatures for the next few days.  For detailed mountain weather information visit avalanche.ca/weather

Avalanche Summary

We're working with very limited observations at the moment and we have not received any reports of recent avalanche activity.

Snowpack Summary

It sounds like people found some great bottomless riding conditions this weekend. Monday's storm snow is expected to bond well to the 50 to 80cm of low density snow that fell last week. Below this new snow we're still dealing with a variable early season snowpack. Changes in wind, freezing levels and snowfall amounts mean that the snowpack structure could be dramatically different depending on aspect and elevation. Layers of buried surface hoar or crusts may be found depending on where you dig. It would be wise to test these layers before committing to a slope. At higher elevations in the alpine, facets may be found near the ground, especially on north to east aspects. Remember that although it's starting to look like winter, its still a young snowpack. Rocks and stumps may be lurking unseen just below the surface. Ride with care!

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.