Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
On a eastern test-slope at 9,800' small wind-drifted avalanches were triggered under the additional weight of my rig and I yesterday. I would expect this problem to be a bit larger and challenging to deal with as you gain elevation and get up into the alpine.
Over the past few days strong winds from the west and a healthy deposit of storm snow colluded to load leeward slopes facing northwest through southeast. Sitting atop less-dense storm snow in many places today's wind-drifts will be 1-2' deep, and pockety in nature. Yesterday, small drifts were reactive, yet stubborn, to ski and sled cuts while stomping around on test slopes. And don't forget about fresh cornices that have built up over the past week, they will be reactive today and if they fail, have the potential to trigger a larger slide than we might expect.
When traveling, I am looking for and avoiding rounded pillows and textured surfaces off of ridgelines and on specific terrain features like cut-banks, gullies and mid-slope rollovers where these drifts will live.