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

Avalanche Forecast

Jan 20th, 2017–Jan 21st, 2017
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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

When the sun comes out today, the storm snow will become more reactive. The new snow is still needs time to stabilize.

Weather Forecast

Unsettled weather continues with a mix of sun and cloud. Freezing levels will rise to 1300m, but the Alpine will stay cool at -6. Ridge winds will be light from the south.

Snowpack Summary

50cm of new storm snow is starting to consolidate into a slab that is sitting over buried wind slabs and isolated pockets of surface hoar. Moderate southerly winds have likely redistributed this snow at ridgetop. The mid and lower snowpack are composed of weak facetted snow from the cold weather we received last month.

Avalanche Summary

Natural avalanche activity dropped off yesterday but explosive avalanche control produced numerous large avalanches in the west side of Glacier National Park. The avalanches were triggered as slabs in the upper start zones and ran to the valley bottom.

Confidence

Avalanche Problems

Storm Slabs

50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and may become more reactive in the sun.
Use caution on open slopes and convex rolls The new snow will require several days to settle and stabilize.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2 - 3