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Archived

Avalanche Forecast

Feb 10th, 2017–Feb 11th, 2017
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
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: Glacier.

Natural avalanche activity should taper today leaving slopes primed for human triggered avalanches.  Avalanches have the potential to run full path.

Weather Forecast

Mainly cloudy with scattered flurries and accumulations to 5cm. Alpine temperature of -7C. Ridge winds SW 30km/h gusting to 65km/h.  Temperatures should cool for Saturday with a trace of snow and continued moderate westerly winds.

Snowpack Summary

45cm+/- of storm snow at 1900m along with 10hrs moderate S'ly winds have formed touchy widespread storm slabs that, if triggered have the potential to run full path. Moderate SW winds should continue to transport storm snow throughout the day today. The storm snow will need time to settle and bond to old snow surfaces.

Avalanche Summary

Ongoing natural avalanche cycle that began yesterday and should continue into this morning. Avalanches to size 3 were reported in Cheops 4 path twice Thursday running to valley bottom. Frequent Flyer path ran across the normal Connaught Creek uptrack, and it will have reloaded overnight. Hwy avalanche control numerous slides to size 3.5.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Storm Slabs

Widespread reactive storm slabs have formed. If triggered they have potential to run full path. Natural avalanche activity will taper off leaving slabs primed for human triggering.
Use conservative route selection, choose moderate angled and supported terrain with low consequence.New snow will require several days to settle and stabilize.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 3

Loose Dry

45cm storm snow in last 48hrs and another 5cm on the way.  Expect to see loose dry avalanches occurring naturally in steep terrain.  Even steep open lines below treeline will require some sluff management today.
Avoid travelling on ledges and cliffs where sluffing may have severe consequences.Be aware of party members below you that may be exposed to your sluffs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2