Rain & Warm Temps in Johnson Canyon

Location Name: Johnson Canyon Region: Donner Summit Area Observation Date & Time: Thursday, April 4, 2019 - 13:00
Location: 39.340247, -120.282837 See map: CalTopo	Is this an Avalanche Observation?: No Conditions Alerts: Rapid or Prolonged Warming Rapid or Prolonged Warming›Rain on Snow Rapid or Prolonged Warming›Warm Temperatures

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Beginning at 6400ft, snow was wet, granular rounds of average 2mm diameter. Skinning up west facing aspect was punchy, deep, inconsistent ski penetration, evidence that it likely did not freeze overnight. Around 6800 ft, a layer of new surface snow appeared. A hand pit dug at 7000ft showed ~2cm of this new snow layer atop a foot or more of fully saturated, wet, granular snow.

Cracking/punching on ascent

Wet, granular snow on surface at lower elevation

Rounds are ~2mm

Hand pit showing saturated snow with ~2cm layer of newer snow on top

Roller balls on East facing aspect across canyon

Terrain Details

Terrain: elevations:

Near Treeline

Below Treeline

Terrain: aspects:

Weather Details

Elevation of Observation:

6000-7000 ft.

7000 - 8000 ft.

Sky Cover:

Broken - Mostly Cloudy - more than 4/8 and less than 8/8

Air temperature:

Above Freezing

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Rain & Warm Temps in Johnson Canyon

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Rain & Warm Temps in Johnson Canyon

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