Snowpack

Observation: Big Cottonwood Canyon

Chasen FairfieldSalt Lake
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Observation photo 1

Quick report

Aspect
North
Red Flags
Rapid Warming, Poor Snowpack Structure
Elevation
2896 m
Slope Angle
15°
Red Flags Comment
<p>Between approx. 45cm - 85cm we have a facet filled PWL (persistent weak layer) that at 9500ft. on North/Northwest aspects on Argenta is between 90cm - 130cm beneath the surface. </p>

Wet snow avalanches and our persistent weak layer were the two areas of greatest concern. The melt freeze crust was still widespread and wet avalanche activity was not present when I got off the slope at 13:30.

Snowpack

Instability Comment
<p>Between approx. 45cm - 85cm we have a facet filled PWL (persistent weak layer) that at 9500ft. on North/Northwest aspects on Argenta is between 90cm - 130cm beneath the surface. It is a fist level firmness. At 100cm snow temp was -8.0 degrees Celsius, at 72cm the snow temp was -6.3 Celsius and at 43cm it was -4.8 degrees Celsius. </p> <p>A melt freeze crust has developed from warm temperatures over the past couple days. This creates more difficult skiing/riding conditions, and also a more dangerous surface as far as avalanches are concerned, for new snow to fall on in the coming days. Wet snow avalanches were also a concern today. </p>

Melt-freeze crust surface pretty much from top to bottom on Argenta from 0930 - 1330. ( 9:30AM to 1:30 PM)