Tahoe National Forest Sierra Avalanche Center

Pit dug adjacent to a wide propagating avalanche that occurred sometime the night of Jan 18. Crown was no longer visible due to post storm NE wind scouring. Debris blocks appeared to be 1 foot or less in thickness. NTL terrain. Unable to probe to ground. HS > 3.5 m

Pitwork performed by Steve Reynaud. Pit dug in near treeline terrain. Dec 31 rain crust probed down 320 cm. HS > 4m, unable to probe to ground.

Dec 31 rain crust down 182cm at this location.

HS > 4.2m, unable to probe to ground. Dec 31 rain crust probed down 235 cm. Pit dug in BTL terrain.

Pit dug in wind protected area below treeline. ECTP was not a clean fracture.

Revisited a previous remotely triggered avalanche from Dec 4, 2022 failing on the Dec 1 facet layer. Where avalanche occurred about ~ 60-70cm less snow than adjacent area. A moderate to strong AR storm is expected early next week with significant liquid precipitation. No weakness found on the Dec 1 PWL with snowpack tests in this area.

Pit dug to document buried surface hoar. Surface layer wet enough for widespread roller balls.