Resource Avalanche Conditions: alerts and observations.

Status
Not open for further replies.
Hold your charge Peeps of the Steeps! It's about as precarious as it would get anywhere. Today and for the next few days... particularly, but not exclusive to, aspects lee to the north and west. More info:https://mountainsportscollective.org
 

Attachments

  • Screen Shot 2017-08-07 at 11.17.17 AM.png
    Screen Shot 2017-08-07 at 11.17.17 AM.png
    13.9 KB · Views: 16
  • SnowPackAssesment_NE_VIC6-01.jpg
    SnowPackAssesment_NE_VIC6-01.jpg
    172.8 KB · Views: 17

Majikthise

Sage
Moderator
Ski Pass
Jan 1, 1970
33,244
21,507
1,063
Blue Mts
I have made the thread sticky will edit the title later this week to 2017 : alerts and hazards or something of that ilk.
 
  • Like
Reactions: POW Hungry

Mister Tee on XC Skis

Not your average unconventional eccentric.
Ski Pass
Jul 29, 2015
13,734
14,844
813
Melbourne, Lockdown-i-stan .
soundcloud.com
We will be very careful on Mt. Bogong this weekend. That means staying near the snow pole lines and avoiding moving off the top of the Eskdale spur. I will be carrying an ice axe and a PLB. Visibility and wind will be factors in whether we can make it to the summit or not.
 
Last edited:
  • Like
Reactions: prcoy
Remove ads with a
Ski Pass

carvin

Hard Yards
Aug 7, 2009
33
33
68
Wow. Can't believe I have to ask this question, but does lee to the north and west mean nw faces or se faces. Thanks so much for the service you guys provide too. Absolute legends.
 
  • Like
Reactions: Rick Ross Da Boss

Majikthise

Sage
Moderator
Ski Pass
Jan 1, 1970
33,244
21,507
1,063
Blue Mts
i'd be treating anything east with suspicion and respect . The stuff that came on the NW is the interface for weakness sitting on top of the hoar, so lee to the SW may not have much depth of it, but what is there has since been loaded when the wind swung to the SW.
 
  • Like
Reactions: mick chopps

Hermannator

One of Us
Ski Pass
Ski Pass
Jul 9, 2010
3,174
2,643
363
The 'Gul
Just back from Machinery... Word from out there is a big slide somewhere N to Ne side of Loch. Cannot confirm but saw a snow cat and skidoos returning from Machinery spur
 
  • Like
Reactions: Chaeron

Ricardo64

One of Us
Apr 5, 2015
432
264
163
57
Melbourne, Victoria
14409604_10157566035255790_854154565824709751_o.jpg
Temptations are high...but seeing such a large dump. Jiminey Cricket tells me er on the side of caution and let the snow pack settle... People you only live once. Don't let it be your last line...
 
Remove ads with a
Ski Pass

Majikthise

Sage
Moderator
Ski Pass
Jan 1, 1970
33,244
21,507
1,063
Blue Mts
Yep will edit down to the bones with each update. Would help if folk read what has already been posted before repeating what already exists.
 
  • Like
Reactions: Cam Walker

Dave Clark

One of Us
Ski Pass
Jun 20, 2005
1,253
1,510
363
Mt Buller
twitter.com
Ski Patrol advised me the Mt Buller summit trail (to the top of the summit) is closed due to instability - be careful out there even in the side-country.
 

DidSurfNowSki

One of them
Ski Pass
Jan 19, 2014
14,272
30,834
813
Canberra, ACT
We saw a smallish one occur wide in Eyre Bowl today. We didn't trigger it, it looked like it went off by itself. Lucky it wasn't too large as we were right underneath it.
 
  • Like
Reactions: rocketboy

Ozgirl

Part of the Furniture
Jul 5, 2007
15,870
18,446
813
Sydney/Jindy
Here's the culprit



yes i saw that! I wondered if it was the same place...

The filmers seem to have the slide further away

If you look at Loccy's photo the slide goes to tress where the filming one doesn't have many tress below it.

Unless it slide again above the trees?
 

sbm

One of Us
Aug 2, 2010
3,064
3,375
363
Sydney
huckanddyno.wordpress.com
i'd be treating anything east with suspicion and respect . The stuff that came on the NW is the interface for weakness sitting on top of the hoar, so lee to the SW may not have much depth of it, but what is there has since been loaded when the wind swung to the SW.

I find it hard to believe (in the absence of strong evidence in the form of multiple snowpits) that any hoar frost would have survived above the treeline, it usually gets blown away before the snow starts falling. I would be really wary of those steep little sheltered gullies down in the trees, where hoar might survived and be buried by swirling snow, and you could easily be buried in the creek bed by a small slide (like that slope left of High Noon at Thredbo where two people have been buried and one killed)

The big slabs under the usual big ridgeline cornices should stabilise relatively quickly (in a couple of days) and also be thick enough to be hard to trigger by a skier (a falling chunk of cornice can do it...) but really huge if they do go (like the Blue Lake avalanche)
 
Last edited:

Whiteman

A Local
Ski Pass
Jun 29, 2003
8,377
1,448
563
66
North Sydney
yes i saw that! I wondered if it was the same place...

The filmers seem to have the slide further away

If you look at Loccy's photo the slide goes to tress where the filming one doesn't have many tress below it.

Unless it slide again above the trees?

No it's the same spot. Look at the small trees directly above Loccy's head. And then note the trees in line with his right shoulder. Just a different view from a slightly different angle I guess.
 
I find it hard to believe (in the absence of strong evidence in the form of multiple snowpits) that any hoar frost would have survived above the treeline, it usually gets blown away before the snow starts falling. I would be really wary of those steep little sheltered gullies down in the trees, where hoar might survived and be buried by swirling snow, and you could easily be buried in the creek bed by a small slide (like that slope left of High Noon at Thredbo where two people have been buried and one killed)

The big slabs under the usual big ridgeline cornices should stabilise relatively quickly (in a couple of days) and also be thick enough to be hard to trigger by a skier (a falling chunk of cornice can do it...) but really huge if they do go (like the Blue Lake avalanche)

Hey SBM, these avalanches in NSW have been the result of a hard melt freeze from late july, then some heavy gloop (early august) that bonded poorly, overloaded with 70cm of low / moderate density wind blown cold snow (last weekend). I'm not sure anybody said anything about hoar frost this time did they? I'd like to know where they found it... as you said, above the trees its unlikely.
 
Last edited:
  • Like
Reactions: 7wombathead and sbm
Here are some 'roses' from yesterday afternoon. There has been a bit of rain since then which will make it worse in the immediate short term, then as it cools we will see that persistent deep weak layer completely bridged out as opposed to the marginal melt freeze crusts (15mm) we have had since 'the blizzard of oz'.

North East Vic
static1.squarespace-11.jpg

Central East Vic

Artboard+27.png


And Main Range we are being heaps conservative. will get a better picture on by tomorrow night.

static1.squarespace-6.jpg


Its likely that with this rain in VIC and cooler temps coming the trend will see all green within the next 24hrs.
 

7wombathead

One of Us
Aug 4, 2010
1,935
1,631
363
South
Apart from Mullers that has north east aspect an is >35 degrees nothing went above 1900 m from my observations from Cauthers on Wednesday. All the big slides that I did not see appeared to happen around 1800 m on east facing aspects. All the cornices above 1900 m appeared to be intact.

Did you guys manage to get down below 1800m on the Crags?

The week before the snow you describe as Glob was pretty nice above 1900 m but was on a thing layer of hoar, and had that dust on crust feel. Contrary to my post about the crags on the back country forum last week the Crags did not slide last week. The actual report was that it was icey and unskiable below 1800 m. I guess SBM was saying that hoar above 1900 m was blown away on Saturday. I suspect that the hazard was around 1800 m on that icy layer where the wind load was very high. Can anyone add to this.

And SBM is correct in that it would be could to have a few pits a bit higher.

So i guess we could share and network this info. I would be keen to do a bit with you guys.
 
  • Like
Reactions: climberman

sbm

One of Us
Aug 2, 2010
3,064
3,375
363
Sydney
huckanddyno.wordpress.com
I've completely blanked on where I got the hoar frost from, I thought someone said the Guthega and Mt P slides were on hoar frost. I get the feeling people aren't on the same page as exactly what hoar and facets look like when they find them. Not too many people carrying around magnifying glasses that's for sure.

Honestly though I haven't been on the snow in Aus since June (I was over in NZ worrying about the PWL there!), I've just been blowing speculation based on second and third hand reports on here, in hindsight it's irresponsible and I should shut up. Thanks for the update @SnowSense.
 
  • Like
Reactions: nfip
Screen Shot 2017-08-28 at 2.37.58 PM.png
Artboard 23.png


Subject: avalanche at Bogong on the weekend

Incident Report
On Sunday 27th August at approx 3pm a skier was traversing from Hells Gap (the col to the east of the junction of Eskdale Spur and the ridge) towards Eskdale Spur on the north-east aspect and had traversed approximately 100m when he was caught in an avalanche. The skier was able to keep his upper body above the snow was carried approx 80m until the avalanche came to a halt. He was able to dig his legs and skis out from the debris and was uninjured.
The release point of the avalanche occurred just below the NE ridge near the top of the rollover, and had a width of >100m. The travel distance was approx 150m. The crown height was not observed directly but the depth of the slab was estimated to be 30cm.

Conditions: The previous day was a melt freeze, with 10cm snow falling overnight from the NW-WNW and during the morning the wind direction changed to SE with a maximum strength of approx 80-90 km/hr.
Three other skiers were in the party, two of whom had climbed west up the ridge pole line to the Eskdale Spur junction and the other skier skied down Hells Gap and checked that the skier caught in the slide was OK.

(Sent via MSC.ORG)
 
Last edited:

luke1234

One of Us
May 31, 2015
132
445
163
I don't know the area but that looks steep from the photo, any idea what the gradient is?

Having skinned up somewhere just to the left of this spot on Saturday, if I were to take a stab, maybe somewhere in the range of 30-35 degrees? But I guess the snow transport may have made it a little steeper by Sunday,
 
  • Like
Reactions: nfip

mr

Old n' Crusty
Ski Pass
Oct 24, 2003
20,249
15,715
1,063
melbourne
Actual avalanche warnings on abc radio about 'backcountry skiing in the powdery snow'. Never heard that before
 

Ziggy

A Local
Aug 24, 2003
9,732
4,825
563
Vic Emergency FB page goes frotting about the risk after every dump.

It links the risk with going remote.
 
  • Like
Reactions: Chaeron

skifree

A disciple of the blessed avi giraffe
Moderator
Ski Pass
Jul 13, 1998
36,595
39,959
1,063
Middle Oz
Any pit reports from yesterday?

Things look pretty consolidated.
 
Status
Not open for further replies.
Remove ads with a
Ski Pass

Log in

or Log in using
Remove ads with a
Ski Pass