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Observation: Turnagain

Location: Sunburst

Date:
Observer:
Route & General Observations

Toured to 3200′ on Sunburst via the standard up track

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Observer Comments

Minor natural roller ball activity

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Sunny with some high clouds
Calm winds
Temperatures in the high 40Fs at 1000' and in the mid 30Fs at 3000'
No precip

Snow surface

1000-1300' unsupportable melt freeze grains, boot pen full leg
1300'-1500' slightly more supportable melt freeze grains, boot pen to knee
1500'-1700' crushable melt freeze crust, boot pen just the foot part of boot
1700'-2000' crushable melt freeze crust with 1-3 cm of dry snow
2000'-3200' solid melt freeze crust with 5-15 cm of dry snow
Upper elevation dry snow was getting more and more damp throughout the day, minor skier triggered roller ball activity
The snow surface gained a sheen as the day processed. There was water dripping out of the mini cornice along the lower Sunburst ridge

Snowpack

Dug at 3200' on a SW aspect, 20 degree slope. 65 cm pit. 15 cm of dry snow (this is new snow from last night,10 cm on top of snow from Sunday 5 cm) on a 25 cm stout MF crust over more MF grains. The 15 cm of dry snow sheared easily in shovel tilt tests and produced a CT 13 SC x 2. ECTX and was non reactive in slope testing. This set-up could be triggered as wind slab in areas that are more wind loaded, steeper and unsupported.

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