Tumalo Full Profile

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Updated:
Friday, Mar 15, 2019 5:06 PM
Observer(s):
Phil Bowker
Position:
Pro Ob
Location:
Three Sisters Area (44.008144, -121.642399)
Ob Date/Time:
Fri, Mar 15, 2019 - 4:20 PM
Report Type:
Snow Conditions
Mode of Travel:
Ski or Snowboard

Written Report:
Skinning up the west side of Tumalo at 10am it was still possible to find areas in the shade of the trees where the snow had not been sun affected, but in the more open areas, on solar aspects, a thin breakable sun crust could be seen. Skiing in Tumalo bowl was very good with ski penetration of up to 20cm (8") in the storm snow from earlier in the week. On the skiers side I dug at three different locations in the bowl looking for buried surface hoar, but did not find it. I did not see any signs of instability in the snowpack while skiing. There is small cornice built up above the bowl, but I didn't find any wind slabs below it.
On the north aspect I dug a pit near tree line and here I found the buried surface hoar about 32 cm (12.5") down. The 10mm (0.4") feathers where still upright and supporting the snowpack above. This layer failed with medium taps giving a resistant planar shear quality. The layer also propagated on medium taps in an extended column test. Certainly a layer of concern to be monitored.
By the time I was leaving Tumalo at 3.00pm the surface of the snow had warmed considerably giving pinwheels in steeper solar areas.

Phil


Weather & Snowpack
Temperature: 0°C Sky: A few clouds
New Snow: 0 cm Snow Depth: 265 cm Elevation: 7411 ft Aspect/Slope: North / 24°


Multimedia

Caption: Tumalo Snow Profile

Caption: Buried Surface Hoar