Snowpack

Copper

Everett Coba, Zach MillerBanner Summit
View on map
Observation photo 1Observation photo 2Observation photo 3

Quick report

Cracking
isolated
Collapsing
isolated

4-6” of new snow overlying crusts. Wind was moderate to strong from the west. Felt a couple of collapses, the largest was a cornice settling while walking on a wind feature connected to an adjacent cornice. 

Isolated cracking and collapsing. Felt a couple of small collapses on solar slopes where crust/facet/crust sandwiches exist about 4 to 6 inches below the surface. Had cracking/collapsing in wind-loaded areas along ridgelines.

Weather

Air Temp
38 at car at 10am
Cloud Cover
overcast

Overcast with warm temps. Temperatures felt 'balmy'. The car registered 38 this morning at the trailhead. West winds were moderate with strong gusts.

Snowpack

Wind slabs were our main concern today. These were isolated to near/ directly below ridge lines above 8000’. Slabs are up to 60cm thick. These slabs felt stubborn and did not easily crack while stomping on them. On exposed West's, the wind had scoured the new snow down to the 3/11 crust.

4” of new snow, with slightly more on leeward slopes. Surfaces were moist below about 7300’ due to warm ambient air, but were dry above. 

The 3/11 crust (down 4") is a crust on all aspects and elevations. On W-S-SE, 3/11 presented as a MFcr/Facet/MFcr sandwich. On shady aspects, this crust was thinner, but still present, even to the top of Copper. 

Didn't directly observe or perform tests on the deeper weak layers buried 2-3' deep. We chose to avoid terrain over about 35* on shaded slopes, assuming they are still present.