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Avalanche Forecast

Feb 1st, 2019–Feb 2nd, 2019
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Cariboos.

Rapid loading from heavy snowfall and wind is the perfect recipe for avalanches. Avoid avalanche terrain.

Confidence

Moderate -

Weather Forecast

FRIDAY NIGHT - Flurries, 5-10 cm / southwest winds, 30-50 km/h / alpine low temperature near -12SATURDAY - Flurries ending in the morning and then a mix of sun and cloud / west winds 20-30 km/h / alpine high temperature near -14SUNDAY - Cloudy with sunny periods and isolated flurries / northeast winds 10-15 km/h / alpine high temperature near -20MONDAY - Sunny with cloudy periods / northeast winds, 10-15 km/h / alpine high temperature near -16

Avalanche Summary

Field observations were limited on Friday, but it is very likely that a natural avalanche cycle was occurring throughout the day.

Snowpack Summary

30-45 cm of snow has fallen in the Cariboos since Thursday, with some areas seeing as much as 60 cm.  This new snow is sitting on wind slab, surface hoar (feathery crystals), facets (sugary snow) and a crust on sun-exposed slopes. 40-60 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 it will likely be reactive due to the recent heavy snowfall.

Avalanche 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.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2.5

Persistent Slabs

40-60 cm of snow sits above a weak layer of surface hoar and crust. This layer is likely to become reactive due to recent heavy snowfall.
Be cautious at and below treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Likely

Expected Size: 1.5 - 3