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Archived

Avalanche Forecast

Dec 8th, 2017–Dec 9th, 2017
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
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
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
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.

With today's high alpine temperature, pay special attention near or below rocky outcrops in the sun.

Weather Forecast

A stagnant ridge of high pressure continues to dominate the weather pattern with no precipitation in the immediate future. A strong temperature inversion keeps low clouds trapped in the valleys while warm temperatures and sun bake the alpine.  Expect light ridge top winds from the west with alpine temperatures reaching 3.0 degrees.

Snowpack Summary

Yesterday's sun and temperature inversion affected the surface snow. Expect to find a crust on solar aspects and a crust/ moist snow on all aspects around treeline, where yesterday's temperatures reached 6.0 degrees. A 50cm storm slab is bonding well to the November 26 crust. Moderate south winds have likely created new soft slabs near ridge line.

Avalanche Summary

Numerous loose avalanches up to size 2 were observed on steep solar aspects, especially near rocky outcrops.

Confidence

Freezing levels are uncertain

Avalanche Problems

Loose Wet

This is day 2 of a strong alpine temperature inversion and very little cloud cover at higher elevations. Solar input and warm temps will cause loose slides on steep solar aspects. Larger slides may trigger early-season persistent crust layers.
Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.Best conditions on sheltered northerly aspects.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 3