Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
Shooting cracks in front of your skis, board, or sled are red flags to unstable snow. While manageable in size, don't forget a triggered wind slab could surprise us, and knock our ride out from underneath our legs, throwing a wicked curve ball in steep, committing terrain.
Since Friday afternoon, the range stacked up 3"-7" of uber-light fluff and coupled with moderate westerly winds blowing 20-30 mph, whipped up a batch of fresh drifts. Found on upper elevation slopes with an easterly component to its aspect and formed on a variety of snow surfaces, including faceted snow, recent wind drifts will react to our additional weight. Today's wind slabs are gonna be big enough to pack a punch, letting me know who the boss really is. So, I remind myself... even a small slide in consequential terrain could ruin my winter season if it strains me through rocks, cliffs, or trees.
Fortunately, we can steer clear of this problem today... lose the wind and you lose the problem. Simply lose some elevation and hone in on wind sheltered terrain. In addition, look for and avoid fat, rounded pillows of snow on the leeward side of ridges, gully's, and cut banks, particularly if they look textured or sound hollow like a drum. And finally, stomp around on small test slopes like road cuts similar to what you wanna ride and see how they're reacting before pulling the trigger on a big slope.
Above is an example of a leeward slope that has been previously wind loaded and has all the right visual warning signs to observe.