Mammoth > Convict > Rock Creek - Road Tour

SNOWPACK OBSERVATION
Mammoth > Convict > Rock Creek
Submission Info
Forecaster
Thursday, March 1, 2018 - 2:45pm
Red Flags: 
Recent loading by new snow, wind, or rain
Mammoth > Convict > Rock Creek
Snowpit Observations
More detailed information about the snowpack: 

Trailhead snow survey:

Ventured out on the roads for a trailhead snow survey from Mammoth south to Rock Creek. A variety of depths with the greatest amount at Twin Lakes Trailhead. Storm slab tendencies within the new snow observed in the Mammoth Basin (8000’ to 8500’). Convict Lake and Rock Creek, less snow with little or no wind effect, no slab tendencies within the new snow.  

By depth:

Twin Lakes, Elev. 8600  (400 PM) – 27 cm to 30 cm (10” -12”). Hand shears - Top 1/3, Easy moderate, planer, stallers. Winds SW/Mod to Strong, Gusts strong. Possible extreme (saw a road sign get pulled off it’s post). That was interesting. New Snow – 4 Finger- over Fist-. Snowfall rate – S2 (~1”). Sky Overcast.  Blowing Snow – SW, Mod, Intense w/ gusts.

Sherwins, Elev. 8300’ (500 PM) – 27cm (10” +/-). Hand shears – Top 1/3, Easy moderate, planer, stallers. Winds W/ Lite, Gusts Moderate. New Snow – 4 Finger- over Fist-. Snowfall rate – S2 (~1”) Sky Overcast. Blowing Snow – SW, Light w/ gusts.

Earthquake Dome, Elev. 8300 (430 PM) – 20 cm (8” +/-).  Hand shears - Top 1/3, Easy moderate, planer, stallers. Winds S/Lt, Gusts Moderate. New Snow – 4 Finger- over Fist-, Snowfall rate – S2 (~1”) Sky Overcast. Blowing Snow – SW, Light w/ gusts.

Rock Creek (600), Elev. 8900’ - 15cm (6”+/-).  Hand shears – N/A (Loose), Winds Calm, Gusts Nil. New Snow Fist-, Snowfall rate – S1 (~. 5”) Sky Overcast. Blowing Snow – Nil

Convict Lake Elev. 7600’  (530 PM) – 13cm(5” +/). Hand shears – N/A (Loose), Winds Calm, Gusts Nil. New Snow Fist-, Snowfall rate – S-1 (~.25”) Sky Overcast. Blowing Snow – Nil 

Note - southerly aspects from ~ 9000 and lower that were bare prior to this storm now have 15 cm to 30 cm and growing (~6" to 12") new, with anchors and ground cover beginning to become covered by snow allowing for more snow transport where the terrain is open and/or predisposed to wind channeling by local terrain features, resulting in crossloading and top loading favored terrain features. Tender wind slabs anticipated. 

 

 

 

 

 

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Strong
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
Southwest
Accumulation rate: 
Greater than 1 in. per hour

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