Weather Observations: Sun tried to peak out through thin sections but mostly overcast to obscured as fog rolled in and out. Temps were very comfortable early with skinning in a soft shell almost too warm. Very light to calm wind. No snow transport observed and potential seemed limited by moist surface conditions.
Avalanche Observations: No cracking, fracture initiation, or propagation observed around Bagley and no releases in steeper 35+ degree terrain on NE-E-SE aspects NTL/BTL. Roller balls from steep turns but no loose moist (dry+, moist-) releases.
Snowpack Observations: NTL @5,300' NE aspect. We experienced an audible whumpf and investigated from a reasonably safe location. The weak layer/ interface resulted in a CTM (11) SP (Sudden Planar) down 35cm, ECTP down 35cm. The interface appeared to be a thin crust facet combo (MFcr/FC). No graupel observed at this interface. Q1 failure occurred above this crust with a Q2 RP (Resistant Planar) result below the crust. MFcr/FC unknown date, February 3rd?