Avalanche

Deep Creek Ridge

Andy AndersonCentral Sierra Nevada
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Quick report

3 to 5 inches of heavy new snow greeted us at the Deep Creek Trailhead. The snow quickly got lighter, colder, and deeper as we climbed the ridge. By the time we reached 7000 ft on the Deep Creek Ridge, 4 to 7 inches of soft light snow existed on top of the previous storm snow. 

Numerous cornices were sticking out over the NW-N-NE facing slopes along the ridge. These broke easily when we kicked them, and we knocked several oven-size cornice pieces onto leeward-facing slopes. None of these cornice pieces triggered cracking or wind slab failures on the preciously wind-loaded slopes. They did entrain the new snow and cause small, dry, loose snow sluffs. The fresh snow remained light and cold through the morning above 7200 ft. During the brief periods of sun in the afternoon, it warmed up quickly at all elevations. Below 7200 ft, we found heavier wet snow. 

We saw several old storm slab avalanches and a small, mostly buried wind slab that occurred on Feb 4. Today, we could still break cornices with ski kicks, but they only caused small sluffs of loose, dry snow on the slopes below.

Weather

Cloud Cover
broken
Recent Snowfall
10 to 17 cm of new snow since yesterday.
Snow Avail For Transport
moderate amounts

Winds remained light at all elevations today with a slight N breeze on the ridges.

Avalanche

Size
D1.5
Aspect
N
Trigger
N
Elevation
6800 ft

We saw several similar storm slabs on steep, N-NE facing slopes between 6200 and 7200 ft. Snow since Feb 4, had mostly filled in the crowns and covered the debris.