Sargents

Location Name: 
Sargents
Region: 
Other
Date and time of observation: 
Fri, 01/18/2019 - 12:00


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain

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

Quick pit on SW facing Sargents at 7,200'.  Of note was the crust/facet/crust sandwich below the new snow (HST-15").  In 3 attempts, I was not able to isolate the column, it failed in the facets between the crusts, sub 1-mm facets, somewhere between 4-finger and fist.  The crusts were knife. The glove marks the facet layer. Note:  I isolated the column with my ski pole, I might have been able to isolate with a more delicate method e.g. saw, just a guess.  The crusts are stout and I don’t think this is a current concern until the crusts decompose.

Snowpit or crown profile photo or graph: 
Any other comments about the observation or links to outside pages that have more info on the observation: 

Other photos:

Density inversion in new snow, medium shear at about a depth of 8”, Lower glove on shear plane, Q2.  Upper glove shows thickness of upper denser snow.

Rime crust, formed during a freezing fog event at about 1pm.  Real subtle, had to use a bare hand to feel it.  Got covered quickly by pellets, some of which are visible.

Cornices are sensitive but are still just breaking the width of the ski used to kick them, no reaction below except for minor sluffing.

 

Also of note:  I tried to isolate pole columns of the new snow on a protected east aspect at 7,400’.  I was not able to, this may be the one area I travelled through today that might have had surface hoar.

I poked and podded many areas while walking the ridge to Sargents with no results except for 2 minor collapse with whumping, the new snow seemed to be behaving more than I expected.

My guess on hazard in these areas is moderate, but please note I did not travel through any north facing terrain and would assume a considerable hazard as forecasted today due to the potential for surface hoar.  New snow as forecasted would bump my guess to considerable for all terrain if we get significant amounts.

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Static
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Some new snow in the afternoon, trace, mostly pellets.

Freezing fog as described below