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After the storm - Avalanche Gulch

Location Name: 
Avalanche Gulch
Mt. Shasta
Date and time of observation: 
Mon, 12/05/2022 - 2:30pm
Observation made by: 
Red Flags:
Recent loading by new snow, wind, or rain

Location Map

96067 Mount Shasta , CA
United States
41° 22' 20.7768" N, 122° 13' 14.8296" W
California US

Snowpack Observations


Today's observation was a tour up Avalanche Gulch to near treeline to observe snow conditions from the recent storm. The remarkable finding of the day was the unstable test results at the new-snow, old-snow interface. Test results ECTP-#21-Q2-↓32in (80cm). The bed surface appeared to be the old snow interface of (Dec 1st) which may have been rained on during the storm cycle. This will be a layer to keep an eye on moving forward. Digging downward, the snow displayed a right-side up snow pack with a snow height of 125cm (49in), increasing in density as it moved downward. A melt-freeze crust exists at 30 cm (17in) up from the ground. Beneath the crust was a cohesive slab of old snow sitting atop roughly 10cm (4in) of facted snow.

The snow quality below treeline was low density and not wind-affected, which made for easy walking. After gaining elevation and more exposure to the elements, the snow subtly became heavier due to more significant solar input and more wind activity. However, there were no significant changes in the surface texture. (Not slaby and still easy walking.) Snow conditions at a high point of (8,300ft) were unchanged, with abundant cold and soft powder canvasing the surroundings. The skiing coverage back down to Bunny was a drastic imporovement compared to three days ago, findng no rocks or hidden obsticals. 

Observation Location: Avalanche Gulch 

  • Elevation: 8,300ft
  • Date: 20221205
  • Time: 1430
  • Observer: E Falconer 
  • Sky Conditions: Obscure (X)
  • Current Precipitation: None
  • Air Temperature: Temp - not taken 
  • Surface Penetration: Ski penetration (PS) = 7in (14cm) (PF), boot penetration = 25in (64cm)
  • Total Snow Depth: 49in (125cm)
  • 24-hour New Snow Depth (HN24): 10in (25cm)
  • 24-hour New Snow Water Equivalent Not taken 
  • Wind Direction: SW
  • Wind Speed: Calm 
  • Column & Block Tests:
    • Slope Angle & Aspect 17º, NW
    • ECTP-#21-Q2-↓32in (80cm)



Weather Observations


Cloud Cover: 
75% of the sky covered by clouds
Blowing Snow: 
Accumulation rate: 
Air temperature: 
Below Freezing
Air temperature trend: 
Wind Speed: 
Wind Direction: