Pizza and Cake Pow Laps!

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/24/2016
Name: JSJ
Subject: Pizza and Cake Pow Laps!
Aspect: South East, South
Elevation: 9,200-12,400′

Avalanches:
Weather: Mostly sunny, light to moderate winds from the WNW, cool temps NTL & ATL
Snowpack: 15 cms HST (at TH), and about 50 cms HST (at summit). Cold, dry, and uncohesive in the morning, becoming moist and slabbing up by 1300. Resting on a soft, dusty MF crust. Easily skier triggered by early afternoon as wet loose slides once the HST became moist on steep terrain features via ski cuts, and running on the old MF crust. Surfaces ATL staying cold where exposed to wind on the surface.

Thick and Crusty

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/24/2016
Name: WN
Subject: Thick and Crusty
Aspect: South East, South
Elevation: 9,200’-12,400′

Avalanches: Small Loose wet slide where observed running on the old dust MF crust as well as a small skier triggered loose Storm slab E aspect. See Photo.
Weather: Mostly clear with low clouds in the valley in the AM, light to moderate winds from the WNW, cool temps NTL & ATL.
Snowpack: The snow was quick to warm up today on S-SE aspects becoming moist and thick before 11:00am. Boot pen 10cm and HS 225cm at 11,000′. Lots of settlement BTL.

Storm-Slab

Star Pass obs

CB Avalanche Center2015-16 Observations

Location: Brush Creek Area
Date of Observation: 03/24/2016
Name: Friends Hut Field Team
Subject: Star Pass obs
Aspect:
Elevation: Near/ Above treeline

Avalanches:
Weather:
Snowpack: Snow totals ended up being far less in the Friend’s Hut zone than other areas. Our storm total was only 3” and transport was minimal. Cornices, drifting and loading upon observation was minimal and controlled by the team moving about on both sides, above and below Star Pass. Teams split up and moved into the basin systematically in radio contact to slice and dice any suspect slope. Most cuts we did were no more than a few inches of new snow on hard surfaces. Obs are decidedly thin new snow, some snow collection in low lying gullies and persistent slabs are stubborn and triggering unlikely.

No storm instabilities but propagating persistent slab results

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 03/24/2016
Name: Zach Guy
Subject: No storm instabilities but propagating persistent slab results
Aspect: North East
Elevation: 9,300-10,700

Avalanches: No recent avalanches observed from Slate River Road, with good views of Emmons and Schuylkill Ridge
Weather: Scattered clouds, mild temps, calm winds, pulse of S1 near sunset.
Snowpack: 25-30 cm of settled storm snow over a dust layer, well bonded to old interface, with no fractures in stability tests and no signs of instability on steep rollovers. Minimal signs of windloading in this area. Snow surface had moistened earlier in the day and was refreezing into a breakable crust on pitches with a ENE tilt.
One profile on a due north slope BTL showed the March 6 facet layer had gained significant strength since my profile in the same area last week. Hard ECTN results and Q2 fractures in compression tests on this layer, Near treeline on a NE aspect, the same layer was above a very thin melt-freeze crust, and below 80cm of 1F slab. We got repeatable hard ECTP Q1 results on this layer (see video).

Sluffing

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 03/23/2016
Name:
Subject:
Aspect: North
Elevation: 11,000

Avalanches: New snow in steep and protected N facing trees was sluffing fast and heavy with every turn, leaving debris piles 3-5′ deep on flat benches. No propagation.
Weather: Snow of varying intensity and gusty winds out of the NW
Snowpack:

anthracites avy activity

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 03/23/2016
Name: MR
Subject: anthracites avy activity
Aspect: North, North East
Elevation:

Avalanches: skier triggered r2d1 in rock chute, looks like it was triggered by a ski cut on the first convexity, new snow fracturing like a slab and running full width and about half of the length of the chute. We triggered any r1d1 pockets that were left on anything 35 degrees or steeper. Also remote triggered r1.5d1 in baby bowl while exiting rock. Blowing snow made it difficult to evaluate depth and location of crown, assuming the same as in rock.
Multiple naturals look to have run mid storm in the trees and openings to skiers left of seven bowl.
Weather: blowing and snowing, wind moving big trees and transporting snow everywhere, including onto the skin track in between laps
Snowpack: 8-12 inches new snow

Family pow pow day

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/23/2016
Name: Dave and Ross
Subject: Family pow pow day
Aspect: North East, East
Elevation: 9,600’-11,300′

Avalanches: 1x R1/D1, at 11,300ft, skier triggered slab, convex roll, 25cm deep and ran 20m on the melt freeze crust layer prior to the storm. see photos. Snow got moist towards the valley floor.
Weather: Mostly overcast, S1 at best. Wind 20mph from the W
Snowpack: At the trail head 10cm of snow sitting on a melt freeze crust. At 11,300 25cm of new snow.

IMG_0533 IMG_0534

Big storm totals

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 03/23/2016
Name: Irwin Guides
Subject: Big storm totals
Aspect: East, South, West
Elevation: 10-12,000 ft

Avalanches: Some instabilities with 30-50cm storm/wind slabs skier triggered up to D1.5 on cuts. East aspect ATL Binge: SS-AScr-R1-D1.5-S This was triggered 15’ remotely, while setting a right hand boundary in Jaybirds while putting a hard turn in just below ridge line. 50cm’s deep, 100’ wide, ran 500’. It ran in the storm snow 20cm’s above the crust.
Weather: S5 all day with some sunny beaks poking through, though never blue. Moderate SW winds gusting to 50 mph. Highs of 23°/12°. 11” new snow throughout the day.
Snowpack: 27 inches w/ 1.35″ SWE in 20 hours.  HST 24″, HS: 82″.  Still snowing S2 a 17:00. Mostly blower, light density snow (5% this morning). Southerly aspects up high got thicker with sun and wind. East had deeper wind slabs.

Dusk on Snodgrass

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/23/2016
Name: ADB
Subject: Dusk on Snodgrass
Aspect:
Elevation: BTL

Avalanches:
Weather: S-1, light winds, obsscured sky with hints of blue
Snowpack: Less than 5 cm of new snow within 24 hours on sun crust.

1″ overnight

CB Avalanche Center2015-16 Observations

Location: Brush Creek Area
Date of Observation: 03/23/2016
Name: Friends Hut Field Team
Subject: 1″ overnight
Aspect:
Elevation: Near treeline

Avalanches:
Weather:
Snowpack: 1″ of accumulation overnight at Friends Hut