Tumalo

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Updated:
Saturday, Apr 20, 2019 1:29 PM
Observer(s):
Phil Bowker
Position:
Pro Ob
Location:
Three Sisters Area (44.005045, -121.641645)
Ob Date/Time:
Sat, Apr 20, 2019 - 12:37 PM
Report Type:
Snow Conditions
Mode of Travel:
Ski or Snowboard

Written Report:
Just as I arrived at the Dutchman parking lot at 9am it stopped snowing and the sun was trying to appear through broken skies. Temperature was 1.5c (35f) in the parking lot. Looking at Mt Bachelor's telemetry it looks like temperatures only just dipped below freezing between 5am and 7am at that altitude. Skinning up Tumalo's west side there was about 3cm of new wet snow on top of an old melt freeze crust.

From the summit it looks like the cornice over the east facing bowl has grown even more from when I reported on it last week. It looks to be about 2.5m (8') at its highest point. Below the cornice a glide crack has opened up, perhaps 30cm (1') wide. Large chunks of debris can be seen in the bowl from previous collapses of the cornice. No doubt with warmer temperatures there will be more. It is possible this may trigger a Wet Loose Avalanche in the bowl.

In the bowl the snow surface is a moist melt freeze crust. Digging down 100cm (3.5') into the snowpack I did not see any signs of instability. While the snow is moist, it was not possible to squeeze water out of snowballs. Throwing snowballs downhill created pin wheels.

Even though it was raining by mid day skiing on the west aspect was surprisingly good.

Phil.
Temperature: -1°C Precip: S-1 Very light snow Wind: North @ 17-25 mph
New Snow: 3 cm Elevation: 7735 ft Aspect/Slope: Northeast / 46°


Multimedia

Caption: Cornice over Tumalo bowl