Mammoth Area-Sherwins, Mammoth rock

SNOWPACK OBSERVATION
Above Mammoth Rock, Sherwins
Submission Info
Forecaster
Tuesday, December 25, 2018 - 3:15pm
37° 36' 41.148" N, 118° 59' 30.1308" W
Snowpit Observations
More detailed information about the snowpack: 

With low light conditions, stuck to the trees today ~9500-10000ft and found fantastic powder skiing conditions.

HNS=20cm avg, near and adjacent to lee ridgelines =30cm. There was some crossloading and pockets of soft slab where terrain captured new snow from both the prevailing SW winds and the N and NE wind that started early in the morning. I was able to get some soft slab pockets to move, all averaging around 30cm deep, but not very wide and nothing slid more than 50-100ft, nor picked up much volume. There was no whoomphing, cracking or other signs of instability while touring up on the Sherwins.

Although the Sherwins still do not have much overall snow, this past weeks wetter small storms and continued settlement of the old snow provided supportable skiing and decent coverage in concave features and protected old growth timber glades. Snowpit showed good bonding of our past two storms (12/21 and 12/24). No surprise as they came in wet, especially 12/21. It was nice that the the Christmas eve storm was right side up and started wet and finished cold. There was some fairly moist to wet snow on the bottom of the pit today, likely from warmer ground due to local geothermal presence.

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
Northeast
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Nice cold temperatures (low 20's-teens) today and significant cloud cover that kept snow good and cold. In the general Mammoth Lakes area it was 100% overcast for most of the day. Around 9am it looked like it would break, but the Mammoth cloud came back in for the rest of daylight hours. Light to Moderate winds from the N and NE today at the 9500ft level. Enough wind that it was eroding snow in N facing terrain and slightly stiffening it up. Around 3pm it started snowing again (S-1) on the top of the Sherwins which made for a wonderful finish to a Christmas day of great skiing.

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