Thursday, Apr 11, 2019 3:58 PM
Phil Bowker
Pro Ob
Three Sisters Area (44.006954, -121.645736)
Ob Date/Time:
Thu, Apr 11, 2019 - 3:17 PM
Report Type:
Snow Conditions
Mode of Travel:
Ski or Snowboard

Written Report:
Below tree line on the west side of Tumalo there was perhaps 25cm (10") of new snow today. Ski penetration was about 15cm (6"). In the trees winds were calm to light from the west. Air temperature was around -1c (30f) at 10:20am.

The summit was quite a different story. Moderate to Strong winds from the west with almost "white out" conditions. The cornice overhanging the bowl is the biggest I have seen it this year, and continuing to grow, I would guess nearly 1.5m (5') in height. In brief moments of visibility I could see fresh debris below the cornice. It looked like a portion go the cornice had fell and triggered a wet loose avalanche. The strong winds were transporting a considerable amount of snow into the bowl. Although I could not observe it, my guess is that fresh wind slabs are being formed below the cornice.

On Tumalo's north west side I dug a test pit to investigate the interface between this weeks earlier wet snowpack and the new snow we have received in recent days. Test profile is attached. While skiing around on Tumalo's west side I did not see any signs of instability in terms of cracking, whumphing, avalanches, etc.

Skiing back down Tumalo's west side was great although nearing the Dutchman parking lot at 1:30pm the air temp was 4c (39f) and the snow surface was starting to get a bit sticky.


Weather & Snowpack
Temperature: -2°C Sky: Broken skies Precip: S1 Light snow Wind: West @ 26-38 mph
New Snow: 25 cm Snow Depth: 255 cm Elevation: 7443 ft Aspect/Slope: West / 8°


Caption: Tumalo Test Profile