Snow Obs above Leavitt Road Junction

Location Name: 
NTL above Leavitt Road Junction
Date and time of observation: 
Wed, 01/31/2018 - 13:00
Location Map: 

Red Flags: 
Rapid warming

Observation made by: Professional Observer
Snowpit Observations
More detailed information about the snowpack: 

From current staging area to gate above Leavitt turn Hwy 108 is 50-60% pavement due to unseasonably warm temps the last few days.  Height of snow at Leavitt junction snow stake (8,400') is 55cm (22").  Found dry snow starting a little below 9,000' on shadier aspects.  Solar aspects had moist snow upper 5cm with moist to dry snow beneath up to 9,500.  Traveled mostly in NTL terrain to 9,700'.  Dug a few quick pits to check status of faceted layers at these elevations.  NE aspect, 9,354', HS 153: found 30cm 4F-4F+ on top of about 20cm of rounded facet/crust combo, then rounded grains below.  Compression test and shovel shear revealed Q2 and Q3 failures above and below crusts in faceted layers but did not get propagation with an ECT.  N aspect, 9,500', HS 120: found more pronounced faceted layer (more angular and looser) 45cm below surface with 4F-1F snow above.  Q3 compression test results on this layer.  No cracking or collapsing while traveling, no new avalanches observed today.


Snowpack photos: 
Weather Observations
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Air temperature trend: 
Wind Direction: 
More detailed information about the weather: 

Warm and sunny.  Calm winds until ridgeline, then light out of the west.  A few clouds to becoming partially cloudy by mid afternoon.

Temps: 12:20pm @ 8,400'  9.5 deg C,  1:15pm @9,354 7 deg C,  2:30pm @9,800 7.5 deg C