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Archived

Avalanche Forecast

Mar 21st, 2015–Mar 22nd, 2015
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

We may not have a good valley bottom freeze overnight into Sunday.  Watch locally for solar effect as this will increase the avalanche danger.  SH

Weather Forecast

Rain below 1800m Saturday night tapering off for Sunday Morning. 5-10cm in the alpine can be expected.  Freezing levels to 1700m Sunday. 

Snowpack Summary

Up to15cm of new snow from this storm in the alpine with moderate SW winds. Wind slabs up to 35cm deep are present in immediate lee areas of the alpine. The mid pack and base of the snowpack are well settled and well bonded overall. Isothermal snow below 2000m Saturday from rain.

Avalanche Summary

Numerous wet avalanches below treeline today in the afternoon due to heavy rains in the Little Yoho region.

Confidence

Freezing levels are uncertain on Sunday

Avalanche Problems

Wind Slabs

New wind slabs are starting to become more sensitive to human triggering on lee features at treeline and above.  Cornices will also be a concern with the new snow and wind.

  • Use caution in lee areas. Recent wind loading have created wind slabs.
  • Watch for whumpfing, hollow sounds, and shooting cracks.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

Watch locally for sun affect as lower elevation slopes may be isothermal Sunday.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2