Sputtery S-1 to S1 all day, prenty of transport on ridge line but calm in the woods
|1||Past 24 hours||
S face Spring/Cherry divide approx 10100'
|D1.5||30cm||Bad visibility but I would guess a wind slab that released naturally yesterday or this morning, partially drifted in already. Guessing 30cm crown, about 20-30m wide, could not see debris so might have run full track.||None|
S face Spring/Cherry divide
|Hard wind stiffened snow on ridge line collapsed on a 2cm layer of trapped Df and remotely triggered the slide from 20m away. Crown about 70cm at its thickest, tapering out to 15-20cm. Slab hardness 1F, bed surface 1F+. See additional picture of crown in snowpack obs.|
|1||Within the past week||
Spring/Cherry divide into Cherry ck, W face
|D2||HS||O-Old Snow||50cm||N-Natural||Went to look at slide reported 2/4 in https://www.sawtoothavalanche.com/pro-obs/20200204_glassing-hailey-to-stanley/. Crown is mostly around 30cm, but 115cm (slope normal) at its thickest. Slab is between K+ and P hard (mostly K) RG, bed surface mostly 10-15cm K windbuff on 10cm, DHch, in places rocks and bush poking through. Failure layer a thin layer of FC. Where the crown is thinner it failed on a thin layer of FC on MFcr about 30cm above bed surface, and stepped down within a few meters.|
Warm temps made storm slab cohesive.
8800' WSW sheltered terrain HS = 90cm 10cm storm slab and various generations of MFcr and DF. At 68cm there was a sadwithc of thin MFcr-FCsf-stouter MFcr/windbuff that might be an issue going forward, this layer was also present on higher elevation sheltered solars.
Very snappy ECTP22@20cm from gnd approx 3mm FC 2cm thick layer on decomposing crust. PST35/100end on the same layer.
Except for the slide I remote triggered wind slabs were surprisingly unreactive on this ridgeline, aspect and slope features seems very specific for touchy slabs to develop.
Bed surface of the Monday slide I investigated was quickly filling in with new snow, and I had some cracking in the storm slab as I was walking around there.
I avoided avalanche terrain except where it had already avalanchedClose