Observation: Brighton Perimeter

Observation Date
12/25/2013
Observer Name
Trent Meisenheimer
Region
Salt Lake » Big Cottonwood Canyon » Brighton Perimeter
Location Name or Route
Brighton Perimeter
Weather
Sky
Clear
Weather Comments
Beautiful Cristmas day
Snow Characteristics
New Snow Depth
8"
New Snow Density
Medium
Snow Surface Conditions
Powder
Dense Loose
Wind Crust
Melt-Freeze Crust
Snow Characteristics Comments

With the avalanche danger considerable on most all shady slopes it seemed like an easy decision to head to south facing terrain today.

Due south probably developed a slight heat crust from the days solar radiation. However, with the cold clear sky and diurnal fluctuations (cooling as heat from the snow escapes into the atmosphere) cycle tonight I would imagine the slight thin solar crust could get eaten up, or perhaps warm up enough tomorrow to not be a problem and still ski pretty nice.

I would guess tomorrow might be the last day for due south skiing before the sun ruins it. The slight off aspects like southwest, southeast stayed dry and cold all day.

Red Flags
Red Flags
Recent Avalanches
Wind Loading
Cracking
Collapsing
Rapid Warming
Poor Snowpack Structure
Red Flags Comments
The poor snow structure is enough to keep me off and out from underneath any steep slopes approaching 33 deg or steeper on the north side of the compass.
Avalanche Problem #1
Problem
New Snow
Trend
Same
Problem #1 Comments

The hardest part - is all the slopes are not as hair trigger anymore, and the collapsing is rapidly becoming a thing of the past. However, you don't want to let your guard down with this type of avalanche problem. These persistent slab avalanches are what we call unmanageable and unpredictable, all you need to do is find a weak spot in the snow-pack collapse the slope (whoomph) and then propagate a fracture (crack) and now were possibly caught, carried, injured or killed in the avalanche.

Most slopes are just hanging in balance waiting for the weary wonderer to jump in. It would be a mistake to jump into a line just because there are tracks on the slope. Its easy to make this mistake because of all the traffic we have in our mountains. I saw plenty of slopes being skied today that I personally would have no part in.

To me the word Considerable is a funny word... What does it really mean? Tom Kimbrough (legend) in one of my first avalanche classes years ago told me this about considerable danger. He said " If I told you that if you walked into that bar over there that you had a considerable chance of getting your ass kicked, would you still walk in? "

This funny story has stuck with me ever since. It is really the same for the mountains, dropping into a shady upper elevation slope approaching 35 degrees in steepness you have a considerable chance of getting your ass kicked in an avalanche.

Comments

Skied with my dad today and the south facing sunny slopes didn't disappoint. Kept it under 33 degrees in slope steepness all day.

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