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Location Name:Gray Butte
Date and time of observation:Wed, 02/27/2019 - 2:00pm
Observation made by:Professional Observer
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
96067 Mount Shasta , CA
United States41° 20' 44.4408" N, 122° 11' 46.1112" W
Observations on tour from Mount Shasta Ski Park parking lot to summit of Gray Butte:
- Very deep surface snow, ski penetration 36-50 cm (14-20 in)
- Below treeline surface snow (< 7000 feet) had slab-like characteristics: blocking and easy hand shears, cracking without much propagation beyond ski tips.
- Wind affected areas were reactive to ski trigger.
- Height of snow near summit of Gray Butte: > 500 cm (> 197 in), could not hit ground.
- Right side up snow pack near treeline: Fist to 1 finger hardness to 2/13/19 crust.
- Column tests on west aspect at 8000 feet did not produce notable results:
- Column Test 3 Taps Sudden Planar Break (CT3 SP) ↓ 13 cm (5 in).
- Column Test 21 Taps Non-planar Break (CT21 BRK) ↓ 42 cm.
- Column Test 27 Taps Resistant Planar Break (CT 27 RP) ↓ 120 cm.
- Skiing indicated storm slab potential in top 13 cm (5 in).
- Late afternoon, below treeline snow surfaces were wet and heavy.
- Deep tree wells below treeline.
- No signs of recent avalanches, though visibility was limited.
Cloud Cover:100% of the sky covered by clouds
Accumulation rate:Less than 1 in. per hour
Air temperature:Below Freezing
Air temperature trend:Warming