Deception Peak

Saturday night brought alpine winds which began to scour alpine slopes. Wind slabs were forming ranging from 1cm to 5cm. By Sunday the Arctic outflow was extreme, all upper alpine will have significant wind slabs. Saturday’s 10cm of snowfall was poorly bonded to the new crust. The mid February sun crusts were bridging the January persistent weak but it was still reactive on compression test.

Conditions changed significantly by Monday from calm no wind to an extreme Arctic outflow with winds gusting to 90kn/hr.

CTM 13,14 (SP) down 50 on facets (Jan facet-crust) ECTN Notes: Saturday’s 9cm snowfall was poorly bonded to the mid February sun crusts which started at 9cm and layered to 16cm. The crusts seems to be bridging the persistent weak layer. Below this are multiple layers of pencil density snow down to the Jan facet-crust which sits at 50cm. The bond is gaining strength and slightly more resistance than last week. Wind crusts were starting to form Saturday night at depths ranging from 1cm to 5cm. By Sunday the Arctic outflow scoured slopes and created significant wind slabs. Temperature in snowpack on Monday at 2pm Air -7.4 T10 -8.1 T20 -7.4 T30 -6.2 T40 -5.2 T50 -4.7 T60 -4.5 T70 -4.1 T80 -4.0 T90 -3.7 T100 -3.5 T110 -3.3