Avalanche Road Tour - Rock Crk to Lundy Canyon (2/8/17)

AVALANCHE OBSERVATION
Rock Crk to Lundy Canyon
Submission Info
D. Lewis
Forecaster
Wednesday, February 8, 2017 - 8:00pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Avalanche Type: 
Wet
Slab
Loose/Point-Release
Trigger type: 
Natural
Bed Surface: 
Unknown
Number of similar avalanches: 
More than 10
More detailed information about the avalanche: 

Road Tour, Rock Crk to Lundy Canyon – Break in the weather allowed for a brief view of some of the avalanche activity from this latest system (Tues-Wed). Saw a wide variety of activity from Wet Loose to probable Storm Slab (R4) running into the low elevations (terminus 7,200’).

Lundy Canyon (7200’) – quick pit near the trailhead. Snowpack HS 78 cm. Isothermal to ground. Top 20 cm wet, water percolating along tis layer (possible decomposing 1cm melt/freeze crust with 3 mm rounding facets 4 cm thick.  CTH22, Q2 @20 cm. Limited visibility, activity noted:, peak immediately north of Lundy Canyon Road, East aspect, start unknown, Based on debris field, R2. Temp: +6 C @ 1330, Elevation 7,400’.

Tioga Pass Rd – slides observed on the south side of the road from V-Bowl Chutes to Poole Power Plant. Debris ranged from D1-D3. Visibility limited but slides debris observed: V-Bowl Chutes (D2), Powerhouse Chutes (D3), and numerous others D1-D2. All appear to be upper snowpack, likely new. Some originating in the Alpine and running to ~8,000’.  Temp: +3.7C @ 1530.

June Lakes – Carson Pk, Carson Bowl R3, D4 Crown visible ~2-3’, width 1100’ (mid path, upper obscured), into Devil’s Slide, terminus bottom (7400’), Start Zone probable summit.  Several other slides off of Carson Peak’s N-NE Face and off adjacent peak to the NW, sizes D2 – D3.

Earthquake Dome – Gate Closed

Convict Lake – Visibility very limited. One D2 visible south side of the lake. 

McGee – previously reported…

Rock Creek – extensive roller balls  and 1 Loose Wet between 7000 -8000 south side of the road. One D2 ~9000 north side of the road. Temp @ 1700 +6., 9800'.

Along 395: Wilson Butte - extensive roller balls and one Loose Wet, Southeast to Northeast aspect, ~8000’. One cornice failure noted, east aspect, 7500’ north of June Lake turnoff.  Low elevation snowpack north of the June Lake turn off has shrunk ~50%.  Sagebrush clearly visible below 7000’. Overall snow depth along the road is less than Mammoth Lakes at the same elevation. Deadman Summit south to Mammoth – snow depth has decreased but still relatively good coverage (~1 meter plus). Extensive rain runnels between 7000’ – 8000’. South to Rock Creek a bit less. 

 

 

 

 

 

 

 

Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Moderate
Precipitation: 
Rain
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Lite to moderate rainfall. Gusty SW winds. 

Rock Crk to Lundy Canyon
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