Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 3
The avalanche in the image above triggered Saturday on an upper elevation southeast facing slope is an outlier, but deserves attention. Breaking 2'-3' deep and a couple hundred feet wide, this slide was triggered on a steep, breakover where the snowpack was thin and weak. Weather prevented me from visiting the site, but Ted investigated and had this insight... "Not normally too concerned with the south facing slopes in January, but there is some buried small grained faceted about two feet deep that might be a factor in the recent sled triggered slide on a southeast facing slope. I dug a quick snow pit on a somewhat similar aspect, but a little higher on the slope and was able to get a crack to propagate across a three foot wide column of snow. It did take several hard hits from the shoulder before it did fail."
In most terrain the snowpack is deep, it's gaining strength, and it's happy in its own skin. However, we're not quite out of the woods just yet and as evidenced with Saturday's sled triggered slide, steep, rocky, upper elevation terrain remains suspect. So, while so much of our terrain is good to go, if you're travels take you to steep, technical slopes today, especially those with a thin, shallow snowpack, think about your exit strategy and the consider the consequences of triggering a slide that has the potential to break deeper and wider than you might expect. Or... with all the good riding out there and miles of terrain to choose from, simply avoid slopes with these characteristics.