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Observation: Bobs Knob

Observation Date
2/5/2013
Observer Name
Matt Primomo
Region
Provo
Location Name or Route
Bobs Knob
Weather
Sky
Broken
Wind Speed
Calm
Weather Comments
Warmest max temp in a long time.
Snow Characteristics
Snow Surface Conditions
Faceted Loose
Melt-Freeze Crust
Damp
Red Flags
Red Flags
Collapsing
Rapid Warming
Poor Snowpack Structure
Red Flags Comments
Thin and weak snowpack at the low/mid elevations with two weak layers of concern: the SH/NSF on depth hoar buried January 10, and melt layer recrystallization NSF below January 23 rain crust. A slab in some places, others not yet. Growing weaker even with hot temps.
Avalanche Problem #1
Problem
New Snow
Problem #1 Comments
See Profile below from site at 7840ft on NE aspect. Also, on E aspect at 8300ft: CTM: Q2 RP on NSF below 1cm rain crust 30cm down. CTH: Q1 SC on depth hoar 45cm down. On E aspect at 8500ft: CTM: Q1, SP on NSF below 0.5cm rain crust 30cm down. CTM: Q1, SC on depth hoar 45cm down.
Comments
Image 1, profile. Image 2, Preserved 5mm SH on a 3mm square grid. Image 3, pit photo with crystal card where preserved SH was found.