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Archived

Avalanche Forecast

Feb 4th, 2017–Feb 5th, 2017
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
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Very touchy storm slabs reactive to human triggers. Conservative decision making will be CRITICAL to playing safe in the mountains this weekend.

Confidence

High -

Weather Forecast

Saturday night: 20-25 cm new snow/ Moderate to strong, southerly winds/ Freezing level 600m.Sunday: 10-15 cm new snow/ Moderate, southerly winds/ Freezing level 400m.Monday: 5-10 cm new snow/ Light, variable winds/ Freezing level sea level.Tuesday: Mostly cloudy with flurries/ Light, variable winds/ Freezing level sea level.

Avalanche Summary

On Saturday, there were numerous reports of human triggered avalanches up to size 2.5 running on a knife hard crust much further than expected. Human triggered avalanches are expected to be very likely throughout the weekend.

Snowpack Summary

35-40 cm of new snow is sitting on a knife hard crust/ice glaze. These storm slabs have been very reactive to human triggers. An additional 20-25 cm is expected by Sunday morning which will increase the expected size and destructive nature of the avalanches. The mid and lower snowpack are settled and well bonded with the average snowpack depth up to 300 cm at treeline.

Avalanche Problems

Storm Slabs

Touchy storm slabs reactive to human triggers. Don't forget about what's above your head. Natural avalanches starting at ridge tops may run to valley bottoms.
Avoid all avalanche terrain during periods of heavy loading from new snow and wind.The new snow will require several days to settle and stabilize.Use conservative route selection, choose moderate angled and supported terrain with low consequence.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3