Observation: Summit

Location: Fresno

Route & General Observations

Broke a non-direct trail from the Manitoba lot, cognizant of managing our slope angles.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

Wind initiated avalanches on Fresno the day before
Whumfing on a three occasions.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Calm with light north gusts
Clear skies
Temps in the single digits to teens

Snow surface

Most of the surface snow was consolidating powder. Areas with exposure to winds from yesterday developed a skin from barely noticeable to a 3-5" wind slab. I suspect this slab formation was much more significant in upper elevations and in more wind exposed areas.


Informal pole probing throughout the tour indicated a slab over fist hard facets.

Our compiled results:

Pit #1
SE aspect
PST 30/100 End and PST 35/100 End ↓100cm on Fist hard 2mm facets

Pit #2
SE aspect
CT11 ↓ 105cm on 2mm facets (F hard layer)
ECTP15RP ↓ 25cm on DF and NSF
PST35/100 End ↓ 100cm on 2mm facets (F hard layer)

Photos & Video
Please upload photos below. Maximum of 5 megabytes per image. Click here for help on resizing images. If you are having trouble uploading please email images separately to staff.