Northwest Avalanche Center

Observation: NWAC Forecaster

All Observations

Basic Information

Observation Details

Observation Date:
January 19, 2022
Submitted:
January 19, 2022
Observer:
NWAC Forecaster - Irene Henninger
Zone or Region:
Stevens Pass
Location:
Stevens Pass (All aspects, 3000-5500ft)

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
None Experienced
Collapsing? 
None Experienced

Media/Attachments

Bumpy, irregular snow surfaces coated thickly treed areas.

Advanced Information

Weather Summary

Cloud Cover:
Partly Cloudy
Temperature:
32°F
Wind:
Calm
New/Recent Snowfall:
5cm above 5000ft Mon night

9am overcast shifted to scattered skies by noon. Sun's effect was intense on southerly half, northern half stayed cold.

Snowpack Observations

A slight overnight freeze was a welcome change after 2 days with minimal freezing. This freeze sustained for the time of my outing (until noon) on the northerly half, whereas south-facing slopes softened quickly, becoming unsupportable on feet by noon or shortly after.

Two quick pits were dug at 5300 feet, one on a north-facing slope, and one south-facing at 10am. The south-facing slope's fresh surface snow was rapidly melting off. Beneath that layer was about 30cm of large (3mm) moist melt forms. The top 10cm of that were P hard, and rapidly decreased to 4 finger in the lower portions. Beneath the large moist grains. Small moist 1 finger rounded grains were present. The north-facing pit had a 5cm knife-hard melt-freeze crust under the 5cm of new snow. Beneath that layer the snow remained moist for about 30cm before becoming dry. There were several 1 finger layers in the top 40cm broken up by thin crusts.

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