Mountain Weather

CB Avalanche CenterWeather

Date: 04/03/2016

Warm, dry weather continues today, with temperatures a few degrees warmer then yesterday and generally light winds. An incoming low pressure trough will bring increasing clouds on Monday, before passing to our north on Tuesday. We should pick up a couple inches of snow on Tuesday but nothing to significant. Then high pressure rebuilds for a couple days around mid-next week as many locals likely head to the desert.

Oh-Be-Joyful Basin

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 04/02/2016
Name: Zach Guy
Subject: Oh-Be-Joyful Basin
Aspect: North, North East
Elevation: 9,000-12,000 ft

Avalanches: More natural small wet loose today, observed on E through S aspects, all elevations in the upper end of the basin which got more snow out of the last storm.
Weather: Few clouds, light west winds. Warm temps
Snowpack: See video. One pit on N aspect NTL; ECTX results on March 6 facet layer, 85 cm deep (ECTN failure with additional loading steps). Facet layer is noticeably smaller and harder than in recent obs closer to town. Snow surfaces were refreezing wet grains on all aspects except due north where we traveled.

Ant, upper Yule Creek

CB Avalanche Center2015-16 Observations

Location: Paradise Divide Area
Date of Observation: 04/02/2016
Name: Evan Ross
Subject: Ant Peak, upper Yule Creek
Aspect: North East, East
Elevation: 11,000-12,600

Avalanches: saw a few old storm slabs on easterly facing slopes. Crowns looked to be around 30cm deep. These old avalanches were in the D1-1.5 range.
Weather: Clear sky, strong solar, calm winds in the alpine.
Snowpack: Toured mostly above treeline in a snow favored part of the range. Sluffing on steep northerly facing slopes and small natural loose wet avalanches on east-south-west aspects. No other avalanche problems observed. Ski pen on shaded slopes was about 25cm with the top couple inches of the snowpack faceted with little cohesion. This weaker snow at the surface created the small sluffing problem on these aspects.

11,000ft, NE aspect, 35 degree slope. March 6th interface was very small rounding faceted particles with no hardness difference from surrounding layers. Our most recent dust event was down 50cm and a CT test produced no results down to that interface. March 6th interface was down about 80cm.

11,600ft, East aspect, 28 degree slope. Moist snow surface. Nothing significantly concerning about the snowpack structure down to March 6th dusty interface. Snow surfaces on east aspects were all moist and shedding roller balls or small loose wet avalanches up to our hight point at 12,600ft

Mountain Weather

CB Avalanche CenterWeather

Date: 04/02/2016

A warming trend and dry conditions will continue through the weekend. Skys will be mostly clear with some clouds popping up each afternoon. Clouds will start increasing on Monday ahead of a trough that should bring snowfall to our area on Tuesday. We’ll start talking about snow numbers for Tuesday, later this weekend.

Hot pow

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 04/01/2016
Name: Zach Guy
Subject: Hot pow
Aspect: South East, South, South West, West
Elevation: 10,000-12,000

Avalanches: Lots of aggressive hi-marking in Ruby Range with no signs of instability except a couple small natural wet loose off of rocky SE and S aspects ATL.

Weather: Few to scattered clouds, calm to light winds, temps rose to 20F at 12k and 30F at 10k.

Snowpack: ~8” of snow settled and moistened through the day on most slopes. Some rollerballing and minor wet loose from ski cuts on sunbaked slopes this afternoon.

Mountain Weather

CB Avalanche CenterWeather

Date: 04/01/2016

Early this morning the cold temps may not feel like April, but that strong sun will warm things up quick. High pressure and dry conditions are building today with little change in the weather as we head into the start of next week. Temperatures will be on a warming trend with mostly clear sky. Our next change in weather looks to be around Tuesday with a quick trough moving through Colorado.

Irwin Cat Operation

CB Avalanche Center2015-16 Observations

Location: Kebler Pass Area
Date of Observation: 03/31/2016
Name: Irwin Guides
Subject: Irwin Cat Operation
Aspect:
Elevation:

Avalanches:
Weather: no signs of instability. The skiing was boot top deep and we did not feel an old layers below in the top bowl. I put in a couple of ski cuts when I dropped in but got no movement. Seems like the new snow has bonded well in this area.
Snowpack: no signs of instability. The skiing was boot top deep and we did not feel an old layers below in the top bowl. I put in a couple of ski cuts when I dropped in but got no movement. Seems like the new snow has bonded well in this area. HST 10″

Mt Emmons

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/31/2016
Name: Dave
Subject: Mt Emmons
Aspect: North, North East, North West
Elevation: 9000 -12,392

Avalanches:
Weather: Warm, Overcast, Clouds building throughout day. We got some sun holes. Calm winds with a couple of light gusts. had a 20 min periods of S1 snow around that did not seem to accumulate to much.
Snowpack: no signs of instability. The skiing was boot top deep and we did not feel an old layers below in the top bowl. I put in a couple of ski cuts when I dropped in but got no movement. Seems like the new snow has bonded well in this area.

Sluffs and variable persistent slab results

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/31/2016
Name: Zach Guy
Subject: Sluffs and variable persistent slab results
Aspect: North, North East
Elevation: 9,500-11,600

Avalanches: Skier triggered one D1 loose dry avalanche, which ran about 500 vertical feet, big enough to bury someone if it was in a gulley.
Weather: Few clouds this morning quickly built to overcast, then decreased to scattered. S-1 to S1 midday, with maybe an inch of total accumulation. Light valley winds from the west, calm winds elsewhere where we traveled.
Snowpack: 4″ of low density new snow over older settled powder; sluffing easily but no storm slab concerns. Dug 4 pits on northerly slopes and found a mix of propagating and non propagating results on the March 6 facet layer, 18″ to 3 ft deep. Structure was most concerning mid slope near treeline, 500-1000 ft below the windloaded ridgeline, where the slab thinned but was still stiff enough for propagation.
1.) BTL N aspect: 45 cm slab over 1mm rounding facets; no distinct hardness change and no results ECTs
2 & 3.) NTL N and NTL NE (tree shaded) at windloaded ridgeline. 90-100 cm slab (4F+ or 1F-), over 4F-, 1-1.5mm rounding facets. Hard ECTN results and SC Compression test results.
4.) NTL NE, midslope. 4F+ 60 cm slab over F+ rounding facets on an almost in-perceivable faceted crust. ECTP14, SC results. See photo.

Propagating extended column test results on a NE aspect NTL

Propagating extended column test results on a NE aspect NTL

Coney’s

CB Avalanche Center2015-16 Observations

Location: Crested Butte Area
Date of Observation: 03/30/2016
Name: Dave
Subject: Coney’s
Aspect: East
Elevation: 9,500-10,700

Avalanches:

Weather: Warm, partly cloudy with with periods of strong sun, light winds had a couple periods of S1 – S2 snow that did not seem to accumulate to much when we where out there. Visibility went in & out throughout day. Wish I put sun screen on for a 2nd time. Felt like a lot of green house effect.

Snowpack: New storm snow 2 – 3 in, no signs of instability. Skin track is still in good shape.