Field Report

Northern San Juan - CO

2025/03/29
Lat: 37.912, Lon: -107.712
Backcountry Area: Northern San Juan
Author: Jeff Davis
Organization: Forecaster, CAIC

Report Information

Observation Summary

Dust on crust day. 1-2 inches of snow fell in the Red Mountain Pass area overnight. Multiple hours of below-freezing temperatures built a firm melt-freeze crust on the surface. Melt water has penetrated deep in the snowpack over the last few days, but the depth of the wetting does change with aspect.

Area Description

Up and back on near lower Commadore normal skin track.

Route Description

Lower Commadore area.

Snowpack

Cracking: None
Collapsing: None

Digging on multiple aspects around 11,300 feet, the depth of the water movement varied by aspect. All slopes had a sought crust on the surface, and boot pen was only 5 cms. On a southeast slope, water had made it to the ground, and basal layers were wet but not yet refrozen. On east slopes, water has made it down the top meter of the snowpack, and the basal layers are rounding. On a northeast slope, water had only penertrated the top 50 cms of the snowpack, and basal layers were still dry under a stiff pencil minus midpack slab. Thinking about Wet Slab potential, it seems like northeast slopes still have the snowpack set-up, but it will take a big push of water to see more of that kind of activity, especially as the snowpack continues to freeze in the coming days.

Weather

Fog, high clouds, and pockets of sunshine.

Observation Media Uploads