Snodgrass

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 01/05/2016
Name: JSJ
Subject: Snodgrass
Aspect: North East, East
Elevation: 9,600’ to 11,200′

Avalanches:
Weather: Light snow from 0900 to 1400, less than an inch of accumulation; very light south wind; temps in low 20s.
Snowpack: Travelled on terrain up to 41* with no signs of instability, besides slow moving and small Loose Dry facet sloughing in steep terrain. Throughout the entire E/NE side of Snodgrass we found an average HS of 80-120cm, with a 10-15cm 1F- hard Persistent Slab resting above 15cms of depth hoar where slope angle was 35* has previously avalanched, and on these slopes total HS was anywhere from 20-60cms, with No Persistent Slab, and the only concern was Loose Dry snow avalanches and hitting buried obstacles. These slopes will again no doubt be ‘repeat offenders’ when another significant load is placed on them.

Irwin Snow Obs

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 01/05/2016
Name: Irwin Guides
Subject: Irwin Snow Obs
Aspect: East, South East, West
Elevation:

Avalanches:
Weather:
Snowpack: Stiff, brittle slab from post-xmas settlement has seen obvious faceting with cold temperatures last 8 days. One ECT on sunny shoulder today produced ECTX, uniform 4F hardness…though not representative of entire terrain and every aspect, is a good sample of how xmas storm slab has changed. UUWW has variable depths and coverage, with some areas 120cm+, while others are clearly faceted through and only 40cm deep. Sun crusts on any southerly slope steeper than 25º. East Barkmarker bed surface has dramatically faceted under and between two melt-freeze crusts and large, striated 4-6mm depth hoar is widespread. 1/4 melt freeze crust from yesterday’s warm temperatures is already propagating under skis.

Searching for the Persistent Slab

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 01/05/2016
Name: Dustin Eldridge
Subject: Searching for the Persistent Slab
Aspect: North, North East, South, South West, West, North West
Elevation: 9,200-9,800

Avalanches:
Weather: Calm and partly cloudy. Relatively warm due to the cloud cover.
Snowpack: The snowpack in this area appears to have lost a lot of strength. In the vast majority of places, the slab from the Xmas storm has faceted into 10-20 cm slab that is Fist hardness. This slab sits upon either fully developed depth hoar on northerly and shaded aspects, the ground on solar aspects, and crust/facet combos on steeper solar slopes that held snow prior to this storm. HS averages around 70 cm. Some isolated areas carry a thick 1F slab, these are isolated to areas that were heavily loaded from the Xmas storm. Snow surfaces are weak across the compass with lots of near surface faceting, pockets of surface hoar, and a thin 2-3 cm crust on steeper south facing slopes.

Snodgrass

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 01/05/2016
Name: Donny
Subject: Snodgrass
Aspect: North East, East
Elevation: 9,600’ to 11,000′

Avalanches:
Weather: Light snow from 0900 to 1400, less than an inch of accumulation; very light south wind; temps in low 20s.
Snowpack: SNOWPACK/AVALANCHE OBS: I skied the skier’s left side of the “Rental Shop” area off of Snodgrass. It had clearly avalanched during the previous cycle, with significant crowns still visible. HS was 50 to 60 cm of pure facets. Primary problem was loose, facet sloughing. This snowpack is totally weak and will not support any new load – something to keep in mind as this next round of storms comes in.

Coneys

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 01/04/2016
Name: Ellie Southworth
Subject: Coneys
Aspect: East
Elevation: 10,330 ft

Avalanches:
Weather: Mostly sunny in the morning with increasing clouds. -1° at 230pm at 10,330 feet.
Snowpack: HS around 100 cm at 10,330 feet with well developed facets on the bottom 35 cm and a 65 cm cohesive slab on top. The bottom half of the slab was P and 1F hardness softening to 4F in the upper 15-20 cm.

We skied a 29° slope and observed no signs of instability while skiing but observed a collapse while we were walking around our pit area. ECTP 18 SC failing on facets 45 cm from the ground.

Mountain Weather

CB Avalanche CenterWeather

Date: 01/05/2016

Yesterday, temperatures above 9,000ft soared into the low 30s, under gradually increasing clouds and very light southerly winds. Today, we will see the southerly disturbance continue to bring cloud cover and greater chances for accumulating snowfall across higher terrain today, but no significant totals until a reinforcing shortwave works across our area tomorrow afternoon into Thursday. Snow totals from this storm look to give the higher peaks 8-12” by Friday, under light southerly wind.

Irwin Tenure

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 01/04/2016
Name: Irwin Guides
Subject: Irwin Tenure
Aspect: West
Elevation: 10,000-12,000

Avalanches:
Weather: Warm clear morning with high temp of 36F, clouded up slowly throughout the day.
Snowpack: HS between 20-100cm’s with an average of 60cm’s and most 4F hardness through out. Thin shallow areas all faceted 2-3mm. Slab feels pretty isolated in loaded terrain features. Little to no cracking on big
shots, just peeling the onion on surface snow but roughing up the surface pretty well.

Castle Valley L & R: Hand shots and 9£ airblasts produced isolated wind slab
pockets of rock bands and shallow dribblers running mostly full track. Slab isolated
and mostly shallow soft snow 40-50cm’s F to 4F. Debris roughing up surfaces nicely
for next storm

Mount Baldy

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 01/04/2016
Name: Ian Havlick
Subject: Mount Baldy
Aspect: East, South East, South, South West, West
Elevation: 9200-12000

Avalanches:
Weather: Increasing clouds in PM, above freezing temps NTL, light southerly wind near treeline.
Snowpack: no signs of instability today. first time in deeper part of zone since before xmas. remarkably different feeling snowpack compared to Gothic/Brush/Cement. Deep and stable. Widespread surface hoar at all elevations, moistening southerly slopes and crust forming with increasing clouds early afternoon. Small dry loose avalanches off steep terrain in Pittsburg area, minimal cornice development considering almost mid january. tracks on steeper slopes.

Snodgrass/Gothic

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 01/04/2016
Name: Donny Roth
Subject: Snodgrass/Gothic
Aspect: East, South East, South, South West, West
Elevation: 9500-11200

Avalanches:
Weather: Increasing clouds in PM, high temp of +3ºC @ 12:00 @ 10,400’, Calm all day
Snowpack: No signs of instabilities all day; SkiPen around 5 to 10cm on average while skinning; surface was moist on south aspects, SH in the shade. South aspect between 10,800’ and 11,200’ had an HS 90 to 100 cm with the bottom 20cm being well developed facets and upper 70cm being a cohesive slab that had more resistance in the bottom. This was the most concerning snow I found all day and we worked low-angle terrain in the trees. Moving to the east, we found a slope that had avalanched previously. There was an average HS of 50cm, 4F snow that was mostly stronger at the bottom with the thin crust and a thin layer of facets under it. We skied a short 35º pitch and then it mellowed to lower 30s. We had no signs of instabilities.

Old Fractures

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 01/03/2016
Name: Pete Sowar
Subject: Old Fractures
Aspect:
Elevation: 10-13,000
“fresh crack party that skied slope possibly triggered or did not notice”