Twin Lakes - Horse Creek

Location Name: 
Cure for the Bridgeport Blues
Region: 
BWRA
Date and time of observation: 
Sun, 02/17/2019 - 12:00
Location Map: 



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

Spent the day skiing above Twin Lakes.  Calm winds, good visibility, and 5 star skiing conditions made for a great day in the hills!  

HNS at the lakeshore: 6-8in.  HNS at 8K: 12in.  HNS at 9500': 18-20in.  

Easy trailbreaking from the lakeshore transitioned to more character-building trailbreaking above 8K as snow depth increased.  Sheltered locations we sporting a settling F-4F storm slab on top of a P rain crust.  The new snow seemed to be well-bonded to the rain crust in the terrain sampled.  Exposed windward aspects were scoured to the rain crust making for slick skinning conditions.  Ski crampons would be helpful in mitigating slide-for-life potential in steep, windward terrain in the near future.  My guess is that it would be hard to make an avalanche that involved the snowpack below this rain crust at low to mid elevations.  The snowpack at and above the rain line from our latest storm cycle has yet to be vetted and remains a wild card.  

We stuck to mostly sheltered terrain and moderate slope angles.  I stomped on a couple small wind pillows and ski cut a handful of convex rollovers that produced minimal sluffing on slopes only greater than 40 degrees. The new snow showed no signs of instability.  No red flags were observed.  

1: Assuming this is loose wet debris from the mid-storm rain event?  Possibly a mid-storm SS avalanche.

2. Booting a section of the scoured rain crust.  

3. F-4F storm slab on P rain crust at 9K.

4. Minor ridgetop snow transport post 1pm.

5. Wind damage and loading on W Crater Crest.

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
Snow
Wind Direction: 
West
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Localized light winds were noted from the S, N, and E at different points in time.  They ramped up around 1pm with moderate ridgetop gusts from the SW.  Periods of S-1 snowfall in the afternoon prior to 3pm when skies transitioned to partly sunny prior to our exit.