Northern San Juan
AvalancheJeff Davis · Mar 5, 2025 · Northern San Juan
Weather
Sun and warm in the AM. Clouds started to build around 3pm.
Snowpack
The new snow fell on many different surfaces. I took a closer look at how the crust that developed during last weekend's warm up and how it is dealing with the new load. The crust under the new snow felt strong just under foot, but digging down it was only a few centimeters thick. Facet growth is prospering under that crust and is something we will be watching as this next round of heavy snow loads slopes. The new snow was bonding pretty well to the crust but snowpack tests showed moderate to hard failures on the facets below the crust. The 2/14 layer is still in the top meter of the snowpack and a layer to watch, but I did not get any failures in that area this go around, but not writing it off. In general, the snowpack in the Red Mountain Pass area tolerated Tuesday's cold snow but Thursday's warm storm will continue to test multiple buried weak-layers in the top meter of the snowpack.
Avalanche
Loose avalanches being triggered by sun out of steep rocky terrain. All size 1 that I saw. A few storm snow avalanches triggered by new snow and wind, with the largest avalanche on an east slope near Black Bear Pass.