Observation: Brighton Perimeter

Observation Date
11/20/2013
Observer Name
Evelyn
Region
Salt Lake » Big Cottonwood Canyon » Brighton Perimeter
Location Name or Route
Brighton Perimeter
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Speed
Light
Weather Comments
Generally light snow, with occassional periods of moderate snowfall. Rain/snow line seemed to be around 7,500', but variable.
Snow Characteristics
New Snow Depth
2"
New Snow Density
Medium
Snow Surface Conditions
Powder
Dense Loose
Red Flags
Red Flags
Poor Snowpack Structure
Red Flags Comments
Not much change in structure - see pit photo below. In addition, some punchy snow felt walking around, seemed to be in the upper layers of denser wind affected snow, not the facets.
Avalanche Problem #1
Problem
New Snow
Problem #1 Comments

In the short term, concerned the forecasted snow and water amounts will keep the buried weak layers sensitive, and triggerable by a person. In the long term, the more snow the better, so the sooner we can develop a deeper snow pack.

Snow Profile
Aspect
North
Elevation
10,000'
Comments

A quick look at a north facing slope - shallow snow pack of about 2 feet. Mid pack facet layer (upper arrow) seems to have strengthened significantly in this area - not reactive in CTs or ECTs, but found with shovel shears and brushing the wall. Depth hoar on the ground was moist, but facets directly below the dirt layer (lower arrow) were still weak. ECTP 21, Q2 , but also several ECT tests with no propegation.

Shallow snowpacks like we currently have can have great variation, especially in the lower layers, over short distances due to changes in ground cover such as rocks, downed trees, etc.

Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Considerable