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Archived

Avalanche Forecast

Dec 18th, 2016–Dec 19th, 2016
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Kootenay Boundary.

Expect avalanche activity to rise with new snowfall accumulating through the day Monday combined with moderate wind and warming temperatures. Danger ratings updated 9:30am Dec19, 2016.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

Monday: Cloudy with scattered flurries, accumulations from Sunday night through Monday 10-20cm / Moderate southwest wind / Alpine temperature -9Tuesday: Flurries, accumulations 5-10cm / Moderate to strong southwest wind / Alpine temperature of -6Wednesday: Cloudy with scattered flurries / Moderate southwest wind / Alpine temperature -5

Avalanche Summary

Expect avalanche activity to rise with new snowfall accumulating Sunday night through the day Monday combined with moderate wind and warming temperatures.

Snowpack Summary

10-20cm of new snow has buried previously formed winslabs, facets and surface hoar. Moderate to strong winds have loaded leeward features with new touchy wind slabs. A widespread crust that was buried in November is typically down 80-100cm. Recent tests show variable results with this persistent weakness. Some show results as hard and resistant and other show it may have the propensity to propagate large avalanches if triggered from thin rocky areas.

Avalanche Problems

Wind Slabs

Fresh wind slabs on the downwind side of ridge crests and terrain features have formed.
On steep slopes, pull over periodically or cut into a new line to manage sluffing.Be cautious as you transition into wind affected terrain.Use ridges or ribs to avoid pockets of wind loaded snow.

Aspects: North, North East, East, South East.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2