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Gumboot Lake

Location Name: 
Gumboot Lake
Region: 
Mt. Shasta
Date and time of observation: 
Tue, 01/14/2020 - 1:00pm
Observation made by: 
Forecaster
Red Flags: 
Recent loading by new snow, wind, or rain

Location Map

96067 Mount Shasta , CA
United States
41° 12' 20.9052" N, 122° 30' 42.2712" W
California US

Snowpack Observations

Details

Observations near Gumboot Lake:

  • TIME: 20200114 - 12:00 to 14:00
  • ASPECT: Northeast
  • ELEVATION: 6,400 ft
  • SKY: Overcast (OVC) then broken (BKN) after 13:00
  • PRECIPITATION: S1 (1 cm / 0.3 in/hr)
  • BLOWING SNOW: Yes
  • TEMPERATURE: 30°F
  • BOOT / SKI PENENTRATION: 50 cm (20 in) , 7 inches (ski) (20 cm)
  • HEIGHT OF SNOW (HS): 55 inches
  • HEIGHT OF NEW SNOW: (HN): HS24: 8 inches (20 cm), HS48: 17 inches (45 cm)
  • WIND: Productive southwest wind on ridgeline a steady 10-15 mph
  • COLUMN & BLOCK TESTS: CT2x2 SP down 35 cm, ECTP12 SP down 35 cm
Instabilities in the snowpack were seen. Column and block tests yielded notable failures below a sun crust atop granular unbonded snow. Old layers underneath new snow are a mix of breakable crusts and sugary snow. More weight could cause these layers to fail. Light, steady, southwest winds were building cornices along ridgelines and depositing snow near the top of slopes. Wind slabs and cornices were still small and stubborn to trigger, though some cracking and blocking was observed.

Photos

  • 3 foot deep cornices forming on ridgeline
  • Ski penetration up to 20 cm (8 in)
  • Light southwest winds building cornices
  • Shooting cracks along tops of small cornices
  • Gumboot Lake looking west
  • 4 inches of packed snow on South Fork road (WA Bar Road) able to drive to 4,300 feet

Videos

Weather Observations

Statistics

Cloud Cover: 
75% of the sky covered by clouds
Blowing Snow: 
Yes
Precipitation: 
Snow
Accumulation rate: 
Less than 1 in. per hour
Air temperature: 
Below Freezing
Air temperature trend: 
Warming
Wind Speed: 
Light
Wind Direction: 
West