Sardine Creek Snowpit

Location Name: 
Sardine Creek Snowpit
Region: 
BWRA
Date and time of observation: 
Sat, 02/13/2021 - 13:00
Location Map: 


Red Flags: 
Recent loading by new snow, wind, or rain

Observation made by: Avalanche Specialist
Snowpit Observations
More detailed information about the snowpack: 

We rode up to the BWRA today and dug a snowpit. We stayed below treeline all day and kept to low angle meadows where the riding is excellent at the moment. Winds were light in well protected areas but moderate in more exposed areas below tree line. Clouds and snow limited visibility today but we observed significant blowing snow and wind scouring above tree line during the few moments of increased visibility. It was snowing lightly (S-1 to S1) through the day with graupel falling at times in the afternoon. Temperatures were relatively cold. Getting back into town at the end of the day, the clouds were beginning to clear in the mountains, but the winds were still elevated. 

We dug a snowpit on a well sheltered N aspect at 8800 ft near Sardine Creek. We found 30-40 cm of total new snow from today's and Thursday night's snowfall. ECT's produced non propagating results on an interface down 30 cm, within the storm snow. We expect that this interface would be more reactive and prone to propagation at higher elevations where the snow is more wind effected. We observed a ~40 cm layer of 1-2.5 mm rounding facets at the bottom of the snowpack. These facets were 4F hard and seem to have gained some strength recently. They did not produce any results in ECT's but a PST propagated to the end of the column at 45/100 cm. It would be very hard to trigger a collapse on these facets, but if you did it could potentially still propagate. 

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Wind Direction: 
West
Accumulation rate: 
Less than 1 in. per hour