Glide in slate river drainage

CB Avalanche Center2019-20 Observations

Location: Paradise Divide Area
Date of Observation: 02/22/2020
Name:
Subject: Glide in slate river drainage
Aspect: West
Elevation: 10000ish. Maybe 250-300ft above 1st switchback on paradise divide rd

Avalanches: Glide avalanche to ground, surprisingly thin snowpack in area. Didn’t run, but very steep.
Weather: Tropical. No wind. Light cloud cover coming in from south. Sunny until we left at 1230
Snowpack: Not surprisingly Big changes from aspect to aspect. East-west rode well. North was holding great. South east- southwest had crust and was quite firm to breakable East has some wind ribbon but didn’t find any win board. This was the only sign of instability we encountered both up and down.

Photos:

Pdivide ATL

CB Avalanche Center2019-20 Observations

Location: Paradise Divide Area
Date of Observation: 02/22/2020
Name: Joey Carpenter
Subject: Pdivide ATL
Aspect: North, North East, East, South East, South
Elevation: 11-12.6k

Avalanches: S Aspect, R2D2.5, ATL, appearing to have run in recent days along the ridge connecting Bellview summit and W maroon pass. Observed from very far away but appeared to be over 1200ft wide (map estimate). Unable to estimate crown depth even through binos.

Large chunk of cornice broke off E side of Baldy within the last day or so. Did not appear to initiate a slab but large chunks made it well into the Quigley basin.

Weather: Low clouds filtered sun for most of the morning to keep snow surfaces above 11k dry. Temperatures remained warm and winds were calm. Clouds built throughout morning to our SW but didn’t make it to upper elevations by the time we left around 130p.
Snowpack: Firm, character building turns up high on any slope that has been exposed to solar in recent days. Shaded slopes were much better. Sastrugi skied well where it hadn’t been cooked off. Variable depth near wind scoured and sun baked ridge lines made for cautious route finding when choosing a decent. Tried to pick the deepest fetch we could find.

Massive cornices have built on the E side of Baldy above Quigley creek.

Photos:

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Mountain Weather For 11,000FT. Sunday 2/23.

CB Avalanche CenterWeather

Date: 02/23/2020

The advertised closed low-pressure system has pushed a plume of moisture into the area and produced around 1 to 4 inches of new snow as of 4:20 AM. The low is still centered well to our west and will head eastward today. Expect moderate snowfall to continue during daylight hours today, comfortable air temperatures in the mid to upper twenties, and moderate wind speeds. Around mid-day, the flow will shift from southwest to the northwest as the low moves eastward. This system will offer a nice refresh to conditions and cover up the recently formed crusts on the south half of the compass. Wind speeds will remain modest but will have just enough gusto to transport the new snow at upper elevations. Closed low-pressure systems are often difficult to predict; this storm as of 5AM is already overproducing so prepared for the possibility of more snow than expected.

On Monday another system will bring snowfall to the area under northwest flow. Accumulating snowfall will linger from Monday through much of the daylight hours on Tuesday. Areas that are favorable for northwest flow events might do fairly well with this two day period of snowfall. We will keep you up to speed as this system gets closer.

  • Today

    High Temperature: 25 to 29
    Winds/Direction: 10-20/SW early AM shifting to NW
    Sky Cover: Overcast
    Irwin Snow: 5-9″
    Elkton Snow: 5-9″
    Friend’s Hut Snow: 5-9″

  • Tonight

    Low Temperature: 9 to 13
    Winds/Direction: 10-20/NW
    Sky Cover: Mostly Cloudy
    Irwin Snow: 1-3″
    Elkton Snow: 1-3″
    Friend’s Hut Snow: 1-3″

  • Tomorrow

    High Temperature: 18 to 22
    Winds/Direction: 15-25/WNW
    Sky Cover: Overcast
    Irwin Snow: 2-4″
    Elkton Snow: 2-4″
    Friend’s Hut Snow: 1-3″

Snodgrass in the Tropics

CB Avalanche Center2019-20 Observations

Location: Crested Butte Area
Date of Observation: 02/22/2020
Name: Rec 1 from the Tropics
Subject: Snodgrass in the Tropics
Aspect: East, South East, South
Elevation: BTL, NTL

Avalanches:
Slab avalanche observed on a westerly aspect NTL-ATL.  Cornice formation observed below rideglines on easterly aspects on Mt. Axtel and Gothic.
Weather: Tropical, warm weather today when we went out at noon.  From noon increasing cloud cover caused temperatures to drop significantly.

Winds remained calm to light throughout the afternoon.

Snowpack: NE aspect, NTL. HS 130. F-4F 30-40cm thick slab above facets on upper snowpack with 20cm depth hoar on bottom. ECTP19 down 30cm failing on 1-2mm facets.

NE aspect, NTL. HS 116. 1F-4F sitting on top of P hard crust. Multiple crusts observed within the snowpack. 3mm large grain facets/depth hoar at bottom. CTN. ECTX. Pulling at both columns after test, columns failed at basil facet layer.

NE aspect, NTL. HS 140. F-1F snow sitting on top of 17cm on large grain facets/depth hoar. CTM Q1. ECTX.

GMT Between Top Of The World And Gothic RD

CB Avalanche Center2019-20 Observations

Location: Paradise Divide Area
Date of Observation: 02/22/2020
Name: Zack Kinler & Evan Ross
Subject: GMT Course Between Top Of The World And Gothic RD
Elevation: 9,600-11,600ft

Snowpack: HS-100-180 cm, below treeline slopes along the course from E-S were moist to wet which will lead to widespread crusting. E and NE slopes near treeline in the Top of the World area remained dry. No signs of instability were noted. A profile on a SE slope at 10,250 adjacent to the course showed stacks of crusts in the upper snowpack with the most concerning layer being a double crust with rounding facets between ~40 cm below the surface. CT results were observed but no results in ECT. Stability on this slope is good.

Mountain Weather for 11,000ft

CB Avalanche CenterWeather

Date: 02/22/2020

As of 0500, all remote weather stations are above zero! Valley inversions are still hanging on, with valley locations sitting in the single digits and ridge tops basking the low 20s. Westerly alpine winds continue to blow in the 20mph range, keeping things brisk up high.

Expect clouds to really to increase across our forecast area after about 11am as the closed low spinning up from Arizona approaches. The San Juans will be most favored by this incoming storm, but for less than 24hrs out, there remains a lot of model uncertainty. Temperatures will be on the warmer side, with potential valley rain (below 8000ft) early on before changing over to snow. Snow should start to fall across the higher terrain late tonight, and continue until around sunset Sunday. Accumulations look to range from 4-8” with this storm, with another disturbance dropping out of the Pacific Northwest for Monday, bringing with it stronger winds, a little more snowfall, and much colder air.

  • Today

    High Temperature: 30 to 35
    Winds/Direction: 10-20 G40/WSW
    Sky Cover: Increasing clouds
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tonight

    Low Temperature: 15-20
    Winds/Direction: 10-20/WSW
    Sky Cover: Mostly Cloudy
    Irwin Snow: 2-4″
    Elkton Snow: 2-4″
    Friend’s Hut Snow: 1-3″

  • Tomorrow

    High Temperature: 20-25
    Winds/Direction: 10-20/W
    Sky Cover: Mostly Cloudy
    Irwin Snow: 3-6″
    Elkton Snow: 2-4″
    Friend’s Hut Snow: 1-3″

Ruby Chute

CB Avalanche Center2019-20 Observations

Location: Kebler Pass Area
Date of Observation: 02/21/2020
Name: Ian Havlick
Subject: Ruby Chute
Aspect: North East, East, South East, South
Elevation: 10-12,800ft

Avalanches: Popped a few small wind slabs no deeper than 25cm descending couloir proper, fairly stubborn with most needing to have been undercut by the previous skier to then pop. Pretty manageable but enough slabs to keep our guard up.

Weather: clear, calm, strong solar radiation and noticeable valley inversion early before 0800.

Snowpack: crusty on souths with most of Monday’s snow either blown clear or cooked down. Shady aspects still hold cold snow and old wind slabs stubborn to weight of skier hang on in areas the sun cannot reach. 60m rope needed for rappel.

Obs from Coney’s

CB Avalanche Center2019-20 Observations

Location: Crested Butte Area
Date of Observation: 02/21/2020
Name: Kyle
Subject: Obs from Cony’s
Aspect: North, North East, East
Elevation: 9,800-10,800

Avalanches: Wet loose slides on South Face of Mineral Point. Debris seen NTL, E aspect in Wolverine basin.

Weather: Sunny, winds calm to light.

Snowpack: Wet snow and refreezing found on Southerly aspects. Shaded aspects did not experience melt/freeze. Poor structure confirmed with a hand pit and pole probes on NE shaded aspects. Strong slab above mudpack persistent weak layer seems supportive of skier weight on E aspects. No collapses or cracks experienced skiing slopes up to 35 degrees.

Look Around The Range

CB Avalanche Center2019-20 Observations

Location: Paradise Divide Area
Date of Observation: 02/21/2020
Name: Evan Ross
Subject: Look Around The Range
Elevation: 9,000-11,500

Avalanches: Simple look around the range near the divide. A few small loose wet avalanches were seen on east and southerly facing slopes at mid to lower elevations. Didn’t stay out late enough to see how SW and W held up.

A fresh cornice released, triggering a slab below that didn’t propagate across the slope very far on An East Aspect of Wolverine Basin at 11,800ft.
On Mt Gunnison, another cornices had released and triggered a large to very large slab on the east face below. This event didn’t necessarily look real fresh, but given what little detail could be seen from so far away its hard to tell.

Weather: Beautiful Day. Mostly clear sky, calm wind and mild temps.

Snowpack: Quiet and settled upper snowpack. Moist snow surface on steep southerly slopes.

Mountain Weather for 11,000ft

CB Avalanche CenterWeather

Date: 02/21/2020

Another clear, calm day is on tap for the Elk Mountains today. High clouds may drift into our area as the closed low in the southwest inches closer. this afternoon.   This weekend, the San Juans and more southerly mountains will be favored, but these closed low circulations are notoriously more fickle, and a slight change in trajectory to the north may produce more snow than the 3-6” currently expected by Sunday. Clouds will increase throughout the afternoon Saturday, with a decent shot of snowfall to be expected Sunday through early next week. A lot of uncertainty remains and details will hopefully align between models within the next 24 hours. Stay tuned.

  • Today

    High Temperature: 30 to 35
    Winds/Direction: 5-15/WSW
    Sky Cover: Mostly Clear
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tonight

    Low Temperature: 10 to 15
    Winds/Direction: 5-15/SW
    Sky Cover: Increasing clouds
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0

  • Tomorrow

    High Temperature: 35 to 40
    Winds/Direction: 5-15/WSW
    Sky Cover: Partly Cloudy
    Irwin Snow: 0
    Elkton Snow: 0
    Friend’s Hut Snow: 0