Avalanche: Girdwood

Location: Notch Mountain

Date:
Observer:
Route & General Observations

Toured up the cat road and took two laps from tree line to the staging area.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger NaturalAvalanche Type Soft Slab
Aspect UnknownElevationunknown
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
Avalanche Details

One natural avalanche was observed on the steepest piece of terrain. It appeared to have run on the most recent storm snow interface that also ended up being our LOC.

SS-NS-R3-D2-S

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

When we started touring at 10:00 current precip was S2, it varied throughout the tour and built to S4 by the time we returned to the parking lot at 15:00. Sky condition was obscured, air temp was not taken, moderate east wind gusting 20+, winds were increasing throughout the day.

Snow surface

Surface particles were precip, the surface was loaded. Moderate wind loading occured between our first and second runs. Boot pen 30cm, ski pen 18cm.

Snowpack

We dug a quick pit at tree line at 12:40. Elevation was 1800ft, north aspect, incline of 20 degrees, snowpack depth 105 cm. Shovel shear test provided a result of STM 30 cm down. A compression test broke on the same layer; CT 13 Q3, 30 cm down.

Facets were present on the ground but our pit was dug on top of low bush blueberry type vegetation that may have impacted the test results in that layer.