Avalanche Forecast
Issued: Feb 2nd, 2019 4:40PM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeThe storm and associated natural avalanches have tapered off to some degree, but give the snowpack some time to adjust to recent loading. Choose conservative terrain.
Summary
Confidence
Moderate -
Weather Forecast
SATURDAY NIGHT - Mainly cloudy with clear periods / northeast winds, 10-15 km/h / alpine low temperature near -30SUNDAY - Mainly cloudy with isolated flurries / northeast winds 10-15 km/h / alpine high temperature near -25MONDAY - A mix of sun and cloud / northeast winds 10-15 km/h / alpine high temperature near -18TUESDAY - Mainly sunny / northwest winds, 10-15 km/h / alpine high temperature near -13
Avalanche Summary
Field observations were limited on Friday, but it is likely that a natural avalanche cycle was occurring throughout the day. There were reports of a few human triggered avalanches to size 2 occurring at treeline and below on Friday. Some of these were remote triggered (triggered from a distance), and failed on a persistent weak layer of surface hoar that was buried in mid January.There are two great MIN reports that outline how reactive the mid January persistent weak layer was on Friday. They can be found here and here.
Snowpack Summary
20-45 cm of snow has fallen in the Cariboos since Thursday. This new snow is sitting on wind slab, surface hoar (feathery crystals), facets (sugary snow) and a crust on sun-exposed slopes. 30-60 cm of snow now sits on a persistent weak layer that was buried in mid January. This layer consists of surface hoar and a crust on sun-exposed slopes. It is most prominent at treeline and below, and was very reactive during the recent storm. It remains to be seen how this layer will behave as temperatures drop. It may still be reactive to human triggers.
Problems
Storm Slabs
30-45 cm of snow has fallen since Thursday. It will take some time for this new snow to bond to the underlying snow.
If triggered, storm slabs may step down to deeper layers and result in even larger avalanches.Avoid steep, unsupported slopes.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Persistent Slabs
40-60 cm of snow sits above a weak layer of surface hoar and crust. This layer was reactive during the storm, and may still be reactive to human triggers.
Any steep opening in the trees should be treated as suspect right now.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Feb 3rd, 2019 2:00PM