More wind slabs were formed on Monday. Lee and cross-loaded features in the Alpine should be avoided. Wind slabs are sitting on a very weak layer.
An additional 5-10cm snow fell on Monday with moderate to strong SW winds. Wind slabs in lee and cross-loaded terrain are found in Alpine features. These slabs are resting on a crust from a recent warm spell. Slabs won't bond well to this crust layer.
Winds will continue to load gully features. Avoid steep, confined terrain. Expect these to run far.
Numerous wind slabs and loose dry avalanches occurred Saturday November 11 up to size 2.0. Many slopes avalanched, then quickly reloaded and slid again. While natural activity tapered on Sunday, avalanche control in an alpine basin with N and E aspects produced numerous size 2.0 avalanches.
A fatal avalanche occurred on Saturday involving ice climbers on the Spray Road. A size 2.0 naturally trigged slab avalanche failed in alpine terrain, ran over a cliff and caught two people in a terrain trap. Unfortunately one person did not survive.
We now have a persistent weak layer (Nov 10) that is down about 20-40cm in the alpine, 10cm at treeline. Very little is known about this Nov 10th temperature crust, but it appears to be spotty aspect wise, very reactive(slippery) and estimated to be up to 2400m. Wind slabs built very quickly Saturday with lots of visible wind transport. An additional 5-10cm fell on Monday with moderate SW, gusting to strong winds have only added to the wind slab problem. Overall snowpack depth and character is largely unknown as it is early season. From what we have seen and heard total snow depth varies from 10-60cm. Coverage is very inconsistent with LOTS of hidden hazards.
Tuesday will be mainly sunny with 40-50km/h winds from the West. Freezing level is forecast at 1400m.
More details can be found in the Mountain Weather Forecast.
