Very Variable in western Taylor Park

CB Avalanche Center2020-21 Observations

Date of Observation: 02/09/2021

 

Zone: Southeast Mountains
Location: Taylor Park
Aspect: North, North East
Elevation: 9400-12100ft.

 

Avalanches: (I realize Taylor Park is outside of the CBAC forecast area, but figured since it’s close and most easily accessed through our county I’d provide some basic observations, if appropriate).

No avalanches observed due to slopes traveled through being less than 30 degrees in pitch, and low visibility preventing us from seeing other surrounding peaks.

Multiple small-large collapses in low angle terrain. 2 slab fractures/collapses on wind-loaded convexities, with both slopes in the 28-30 pitch at their steepest, and cracks propagating 30-60 feet. On inspection of the second collapse, 1F hard wind slab appeared to have broken on basal facets. The snow pack here was deeper than anywhere else probed during the tour, about 3 feet.
Weather: Low visibility, S1, winds estimated at 0-20 mph, temps ranging from roughly 30-20 degrees.
Snowpack: Very variable! Ranges from a few inches to about 3 feet. In many places the entire snowpack was faceted through. In some places we found F-1F slabs on top of facets. In a few isolated wind tunnels we found P hard slabs that we couldn’t get to collapse or crack with two people jumping on. Overall it appeared that the western portion of Taylor park did not receive much of the recent snow.

 

Photos:

East side got in on the action

CBAC2020-21 Observations

Date of Observation: 02/08/2021
Name: Eric Murrow

 

Zone: Southeast Mountains
Location: Cement Creek viewing into Southeast Mountans
Aspect: North, North East, East, South East, South
Elevation: most of it

 

Avalanches: A bunch :-) Did not observe any below treeline avalanches but I largely could see near and above treeline terrain across the Southeast Mountains. Most avalanche activity was on drifted northeast through east through southeast slopes. A few looked to be close to D3 in size, most were D2, but I often only saw the crown not the extent of debris. Overall there was less avalanche activity in the Southeast Mountains than the Northwest Mountains and the size was often a bit smaller none the less there were many dangerous avalanches observed from the past few days.
Weather: Mostly clear to partly cloudy skies with strong winds near treeline. Some snow transport was observed but many above treeline slopes look to be hammered by the wind with fetches running low on transportable snow.
Snowpack: Spent just a second looking at the snowpack but at 9,700′ near Deadman TH, I found HS of 85cm with 25cm sitting above mid-January weak layer. Further up Cement Creek near Reno Divide HS climbed to about 100cm with 35cm soft slab resting above January weak layer. Did not observe any below treeline avalanche but I would suspect with another round of snowfall, steep below treeline slopes will start to become dangerous in this area.

Photos:

 

Angel ridge and Schuylkill Peak Avalanches

CB Avalanche Center2020-21 Observations

Date of Observation: 02/07/2021

 

Zone: Northwest Mountains
Location: Seen from Camo trees.
Aspect: North, North East
Elevation: Atl. 11.5ish

 

Avalanches: Everywhere on East slopes, with many north and some southeast with start zones generally ATL and running long seemingly due to wind loading being the straw. Most appeared to go to ground in at least some parts of start path and step down. Pictured: D2.5+ schuylkill peak. D2 on angel ridge. Ran long. Almost to creek on both and thru lots of terrain often too flat to ski. Hard to tell height of crown but visible ground underneath crown.
Weather: Warm At valley bottom with cold wind As you got into Baxter. Sunny, didn’t see evidence of too much warming on southern slopes at that elevation although a crust on south wouldn’t surprise. Windy ridge tops with visible and constant transport on east facing slopes.
Snowpack: Finally supporting sled weight. Lower angle north trees had wind texture and somewhat thicker snow, but overall fun and fast powder. Didn’t dig today as the evidence and warning signs were apparent, last storm snow had been significant and wind loading especially on East faces was obvious from the avalanche activity.

 

Photos:

Irwin avalanche activity

CBAC2020-21 Observations

Date of Observation: 02/07/2021
Name: Irwin Guides

 

Zone: Northwest Mountains
Location: Irwin
Aspect: South East, South
Elevation: NTL

Avalanches: Avalanche observations:
Sunny Shoulder Right SS-N-R2/D2-O 60cm x 100m x 200m triggered by wind load
Premature Evacuation SS-AEr-R1-D1.5-O (60cm x 15m x 65m) Apron Remotely triggered D1.5 from 80′ away
Bender SS-AB-R2-D2-O (85cm x 50m x 135m) Sympathetically triggered apron below cliffs.

Photos:

Photos and more details from Irwin Burial on Saturday

CBAC2020-21 Observations

Date of Observation: 02/04/2021

Zone: Northwest Mountains
Location: Sunny Shoulder on Irwin Tenure
Aspect: South
Elevation: 11,600

Avalanches: Patroller capture and full burial on Sunny Shoulder Right (SW@ 11.6k near TL) during AM ski checks. Companion rescue, no injuries. The SS-ASu-R2/D2-O 75cm x 15m x 100m ran on a crust, but not the most recent crust; stepped down lower in the track; and fetched up in the compressions zone producing a debris field ~75m wide and up to 3m deep in spots. The slope was not open, but was being prepared for opening. It received ~30 lbs of explosives (6 shots) yesterday including a 17lb air blast.

From the patroller: “The slope failed when I was more than half way down. I never felt or heard a collapse. The avalanche overtook me at the bottom of the slope. I was buried around a tree with a good air pocket. Partner had me dug out in 6 minutes.”
Snowpack: Multiple m/f crust facet layers with our latest two storms on top. The slope had seen four 2-pound explosives as well as an 18-pound air blast the day before with no results.

 

Photos:

The Keebler Elves were cranking

CBAC2020-21 Observations

Date of Observation: 02/07/2021
Name: Zach Kinler
Zone: Northwest Mountains
Location: Kebler Pass, Lily Lake, Irwin
Elevation: 9,000′-10,400′

 

Avalanches: Observed several avalanches with fresh crowns and debris that look to have run in the last 12-24 hrs as well as some that ran late on 2/5 or early 2/6.  Poked around the debris from the Ruby D3+ avalanche. There were numerous broken trees up to 5″ in diameter in the debris field.

Weather: Winds picked up in the afternoon and began to pick up a bit more snow. Snow on a few ridgelines was getting blasted into the sky while efficient loading was occurring on Scarp ridge. Moderate winds were making it down valley in open areas below treeline.  Temps were warm with abundant sunshine.

 

 

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Mt Emmons Avy 1

CB Avalanche Center2020-21 Observations

Date of Observation: 02/07/2021
Name: Evan Ross

Zone: Southeast Mountains
Location: Mt Emmons
Aspect: South East, South
Elevation: 9,200-11,700

Weather: Partly cloudy sky, warm temps, winds increasing in the afternoon. At times snow was transporting off the peaks and NTL/ATL ridgelines, though not consistently and fetches were running lower.

Snowpack: 2/7. No obvious signs to instability observed. The upper snowpack was becoming thick with warm temps and the sun. In the afternoon the wind started to buff the snow surface and create pockets of stiffer wind board around 11,000ft. We simply used the terrain to manage the avy problems, had some good turns and didn’t go looking for unstable conditions.

2/6. Similar tour as the following tour on 2/6. We spent a bit more time investigating the snowpack structure on a ESE aspect at 10,400ft. The slope angle at this sight was about 30 degrees. HS 140cm. The 12/10 interface was easy to feel with a ski pole and identify in the pit fall. This layer of concern consisted of F hard ~2mm NSF. Facets below the crust at the 1/19 interface were not immediately identified in the pit wall. Small column tests more clearly identified this 2nd layer of concern and produced sudden results. No obvious signs to instability were observed on this tour, until a couple occasions were someone didn’t have skis on and punched deeply into the snowpack. Several large collapses resulted.