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Tumalo Mountain

Rapid temperature rise
Observation Date/Time:
Mon, Dec 7, 2020 - 2:00 PM
Alex Hogue
Other / 7776'
Report Type:
Snow Conditions   No Avalanche Activity  
Travel Mode:
Ski or Snowboard  
Sky Conditions:
Scattered (3/8 - 4/8)
Precip Type/Intensity:
No Precipitation

Written Report:
*I am not an avalanche / snow expert, just want to share my findings to keep everyone safe!*

Came up tumalo west side at 1pm, partly cloudy skies wind from w/nw to east at about 7mph at summit with gusts to 12 or 15mph. Snowpack on west side had seen many tracks, hard packed snow with icy spots. Didnt hear whooshing or see any signs of avalanche. Red flags would be the cold nights and relatively warm weather (up to 50 degrees f) causing rapid warming, and also wind blown snow from prior windy days.

Dug pit at summit (7770) and did single column test.

Snow depth at 110cm on about 32 degree slope NE facing. Snowpack single column test failed with Propagation at CT+22 at 90cm depth and again at CT+28 at 70mm depth where about a 3mm thick hard layer has formed.

Saw ice slab / hoar at 70mm (about 3mm thick) smaller thin layer again at 50cm and a large slab at 35mm that was about 5cm thick. It seemed fairly well bonded but large impact could trigger.

Many tracks down the bowl, snowpack held solid when I went down, no signs of avalanche. But has seen wind blown conditions. Snow was heavy packed powder.

Continuing down W /NW side i saw no signs of prior slides. Snowpack was very heavy and slow, icy in shady spots.

Stay safe pit there!