Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Feb 9th, 2018–Feb 10th, 2018
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Although the storm is over, large natural avalanches are still running as of this morning. Expect natural avalanche activity to continue as the sun makes its debut.

Weather Forecast

The storm is over.  Expect mostly sun today with cloudy periods. Alpine temperatures around -13.0, light ridge winds and freezing levels remaining at valley bottom.  High pressure with nil precipitation continues through the weekend. Weather models show a pulse of moderate precipitation arriving Tuesday night, bringing up to 20cm of snow.

Snowpack Summary

Approximately 60cm of new snow in the past 36hrs is settling into a widespread storm slab. Storm slabs will be deeper and more reactive in wind affected areas. Dec and Jan persistent weak layers are now buried 150-200cm in the snowpack. Height of snow is 350cm at 1900m. 

Avalanche Summary

Numerous natural and artillery controlled avalanches up to size 4.0 during the avalanche cycle that accompanied yesterday's storm. Several ran full extent, taking out mature trees. A large natural avalanche, size 3.5, was observed running to the valley bottom this morning in the HWY corridor. Natural activity has not yet subsided.

Confidence

Avalanche Problems

Storm Slabs

The last storm brought over 60cm of new snow in 48hrs. Storm slabs remain touchy and are still resulting in large natural avalanches, as recently as 0700 this morning. Expect the "first kiss of the sun" to trigger more storm slab avalanches.
Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1.5 - 3

Persistent Slabs

Several deeply buried persistent weak layers are primed for natural and skier triggering with the new storm load. These slides have the potential to reach the full extent of their run-out zones. Mature timber may not be a default safe spot today.
If triggered the storm slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2.5 - 4