WInds Above Treeline

Location Name: 
Winds Above Treeline
Region: 
Williams Lake Area
Date and time of observation: 
Mon, 01/06/2020 - 11:54



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

Went to see how the snow had been impacted by the Strong West shifting to North winds over the last 24 hours.  Windy conditions existed at all elevations with strong winds at ridgetops and above treeline.  Snow was scoured on all aspects with inverted tracks visible.  Snow was being transported but was all sublimating into the air and not actually being loaded on the slope.  Slopes had small breakable wind crusts or firmer harder surfaces or softer sastrugi that made for ok skiing if you picked your line. 

Below Treeline our snowpack has been settling since the last significant storm on 12/28, and overall, we have a very shallow snowpack (30 to 75 cm) with lots of natural obstacles. 

We continue to find shallow snowpacks near and above treeline (Less than 2 meters) that continue to show signs of faceting.  On ENE and NE aspects below Kachina Peak, were finding weak faceted snow mid pack or near the ground with more cohesive slabs resting on top.  With snow in the forecast Thursday Night into Friday this poor snowpack structure may very well be tested with an added load of new snow. (See Video)

 Photo 1: Strong winds above treeline with Gusts in the upper 50's out of the N/NW

Photo 2: Strong winds overnight have stripped and scoured slopes especially above treeline.  Inverted Tracks in many places

Photo 3: ENE Aspect @ 11,800'

Snowpack photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
Clear
Air temperature: 
Below Freezing
Wind Speed: 
Strong
Air temperature trend: 
Warming
Wind Direction: 
Northwest
More detailed information about the weather: 

Very windy with NW winds sustained in the 20 to 30 MPH range gusting into the 50's.  Sunny day with not a cloud in the sky.  Temperatures this morning started off in the single digits, with temperatures warming at lower elevations into the low 20's but staying in the single digits above 12,000'.