Loose Wet
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–1.5
The daytime high temperature will be increasing on Friday and the sun will be out. Slopes in the direct sun will be cooking. As the surface snow heats up it can loose cohesion leading to wet loose avalanches. Most wet loose avalanches will be small, but they can run long distances on sustained steep slopes. Use your evaluation skills to recognize when this problem is coming on. Pinwheels and roller balls are good indicators that the surface snow is heating up. Visibly wet and slushy surface snow down to 6" or more is another indicator. Use timing and aspect to minimize your exposure to this problem, especially when travelling in sustained steep terrain. If you see the indicators of wet loose avalanches, consider moving to shaded slopes or slopes out of the direct sun.
(4/3/2025) Photo: Aaron Hartz
Roller balls on a SW aspect above treeline. This is a good indicator that the wet loose problem is coming on.