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

Avalanche Forecast

Jan 19th, 2017–Jan 20th, 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
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
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.

The storm slab is becoming more dangerous with warming temperatures.

Weather Forecast

Mainly cloudy today as the storm begins to taper off. Light flurries are expected with light rain at times below 1500m. Ridge winds will be SW 20-35 km/h. Temperatures cool off heading into Friday but the weather remains unsettled with trace amounts of precipitation.

Snowpack Summary

Warming temperatures have consolidated 50cm of new storm snow into a slab. Southerly winds to 45 km/hr have likely redistributed this snow at ridgetop. The recent snow has buried existing wind slabs and spotty surface hoar. The mid and lower snowpack are composed of weak facetted snow from the last month's cold weather.

Avalanche Summary

A natural avalanche cycle began yesterday morning with large size 3.0 avalanches east of Rogers Pass summit. Throughout the day artillery avalanche control produced several large far-running avalanches ranging from size 2.5 to 3.5. Avalanches were easily entraining new storm snow and were accompanied by a large power cloud component.

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 reactive.
The new snow will require several days to settle and stabilize.Use caution on open slopes and convex rolls

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 3