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Archived

Avalanche Forecast

Dec 8th, 2018–Dec 9th, 2018
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
1: Low
The avalanche danger rating in the alpine will be low
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: Glacier.

Got a headlamp? It's nearly dark at 4pm so get back to the trailhead before you have to use it! Many early season hazards exist at all elevations.

Weather Forecast

The general trend is for increasing cloud, culminating in a weak series of storms the next few days. Saturday will bring a mix of sun and cloud, alpine temp's of -7*C, and light SW winds. For Sunday and Monday, scattered flurries should bring 5-15cm of snow. Winds will pick up to moderate from the SW and freezing levels will rise to 1200m.

Snowpack Summary

The height of snow at Mt Fidelity is just below average for this time of year; see the graphs that are hyper linked here for more info. The main layer of concern is the November 21st surface hoar, which is buried beneath 25 to 40cm of storm snow. This layer is most likely to be triggered on steep solar aspects, where it overlies a crust.

Avalanche Summary

No new natural avalanches have been observed in the highway corridor or reported from the backcountry in the last four days. Groups have been riding steep, unsupported features on many aspects and only seeing minor surface sluffing.

Confidence

The weather pattern is stable

Avalanche Problems

Persistent Slabs

This layer can be found at all elevations, but is spotty in its distribution. It will be most reactive in wind loaded areas and on steep solar aspects where the surface hoar sits on a crust.
Avoid thin, rocky or unsupported slopes.Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2