Tumalo conditions

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Friday, Mar 9, 2018 7:48 PM
Aaron Hartz
Pro Ob
Three Sisters Area (44.004222, -121.640797)
Ob Date/Time:
Fri, Mar 9, 2018 - 7:24 PM
Report Type:
Snow Conditions
Mode of Travel:
Ski or Snowboard

Written Report:
The storm did not quite live up to the forecast. I measured 2-3cm (about 1") of new snow on Tumalo today. It was sitting on a melt freeze crust that Gabe noted in his profile from yesterday.

I found some pockets of isolated wind slabs along the summit ridge above the bowl (ENE facing). The pockets were shallow and 2-3" thick and not widespread. The most notable wind slab I found was on the north ride (the ridge on far skier's left of the bowl). Here the wind slab was up to 5" thick (see picture). It was well bonded to the older snow beneath. I found no cracking in the wind slabs, no slabs breaking loose, and hard results on hand sheer tests.

There were some small cornices on the top of the bowl and up to several feet high and one or two feet out.

Overall, I found a stable snowpack on Tumalo today. No weak layers were observed.

The wind was light and varied from SE to west, but was mostly westerly. Air temperature ranged from 0.5C (33F) at 6500ft to -3C (27F) near the summit of Tumalo around 7700ft.

Skiing in the bowl was good with a smooth surface.


Caption: Chunk of wind slab removed from surface on the north ridge of Tumalo