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Nice report!  How about a photo?  

I know you've got one....     ;)
Correct me if I'm wrong, but I believe a garland is ski-instructor speak for a turn where you initiate the turn one way and then wash it out with a side slip the other way, leaving a track that looks like a garland on a christmas tree.  A useful survival skiing technique, and a way for learners to practice turn initiation without crossing the fall line (and thus limiting acceleration).
I'll check with Andy about getting you those images. Although he's an intermediate student, and therefore might be a bit surly and stubborn. ;D  When do you need them?
"Under sixteen hours," you say?


Yeah, we didn't really stop for more than maybe an hour and a half total all day.  
Nice photos and video Sam.  That area sure is beautiful isn't it?  One of the nicest around I think.  We wanted to ski that line on Klawatti last spring when we were up there, but it had already melted out.  Looks like you got it good.
Great report, Charles.
What's a garland?
Just now getting back. I'm glad parties in both spots made it back safer and wiser.
A Pound, I'd Like to use the photos in mountaineers avy class if I could. They are both great examples of wind loading around a ridge.
"Under sixteen hours," you say?  Nice going.  Great photos & video, too.  
The hut was fine.  Stove worked OK.
Snowpack too thin for Bernard's Boulders.
As it was I was stopped very suddenly by a buried rock on lower Steepness. Put a ski tip to my forehead. A little bloody.
We did not dig pits. There was an inch crust and you could pole down a couple feet to the hard layer.

I had followed the avy reports that week and yes, I did monitor the telemetry reports and noted the extremely high winds.

I knew the east slopes were loaded, but the party discussed a west descent, which was wind blown of course, and we concluded the top of the east slope wasn't as wind deposited because of the tree barrier along the ridge.

Hindsight, we should not have ski...
At the great risk of eliminating myself from ever enjoy ing turns with either the Granite West  or Heather Ridge party members. Didn't any of you in either party access the previous days(Friday ) telemetry? Yes, both  Both places were the nearly the same Aspect and elevation. Both places also had good nearby sheltered tree skiing. The pictures are are great examples of side loading on a ridges.Both Stevens and Snoqualomie (70mph)had heavy winds on Friday.  
Good call.  I suspect the road's already cleared past where you would have come out.  Would have been a walk out to CM Blvd.
We went about 1/2 way down Kempers and skinned back up so I don't know what it is like at the bottom.  There was good coverage to where we stopped, but below I could see that it was not as filled in as I have seen it in the past.  Generally it's not been a great year for low elevation snow as I found out two weekends ago doing a circumnavagation of Mt Thompson.
James I am curious to find out how snow conditions were below Kempers?  Did you have to negotiate any sketchy terrain to get back to 410?

Stevens Pass had it's own "whoomps" but they were from this huge Car Toys tractor trailer full of subwoofers.  


New theory:  Subwoofer induced slope instability? 8)

This was the same aspect and near the same elevation as the remotely triggered slide at Heather Ridge.  Randojohn - did your party dig any pits?  Any thing else you can tell us about the snowpack?  Any other whoomphs during the day?
The three previous photos are courtesy of Andy Pound, who lived to tell the tale.
A closer, "oh, my God, what were we doing on that slope" view.
Another view a bit lower.

Our party was skiing just right of the trees, above the slide when we heard, and felt, a loud whoomph! The slide is on an SE facing slope. We skied the ridge to the left out.

A classic windloaded slope as you see the somewhat scoured ridge.

So now you know why you had it all to yourselves.

This is making my $47 tab at the lifts across Hwy 2 seem more worthwhile. I was really tempted to head up and over there, but...

Stevens Pass had it's own "whoomps" but they were from this huge Car Toys tractor trailer full of subwoofers.  Not exactly a wilderness experience, but a beautiful day with great powder in the trees and windpacked on the open.
Yes, an interesting, informative discussion, particularly in combination with a few more technical issues addressed at
Thanks for sharing your thought processes openly, guys! This is good reading material.

I'm reminded of comments I heard many years back in Avy Level I training about group dynamics (e.g. make your own calls, pay attention to the worriers in the group, that sort of stuff), as well as about paying attention to all the factors (including whoomphing in particular - something they mentioned much more strongly in my CO class than in the one I took with Gary Brill not far from where you guys we...
Matt:
Yes, you are thinking of the correct place.
As far as solar heating affecting stability...that's highly likely.  We did have a few sunbreaks on and off throughout the day.

This has all been very good discussion.

Where exactly is Moonlight Bowl?  Is this the sparsely treed bowl just east of the pass and above the highway across from Yodelin?  The lower reaches above the flat PCT are cloaked with slide alder and dense forest?

What was the weather like?  If this is the bowl I am thinking of, that area will tend to get heated in the slightest sunbreak of which there were a few Saturday near Snoqualmie Pass.  I'm wondering if slight daytime heating consolidated the new snow into a...
most of my close calls with avalanches can be traced to faulty decision making.  this time i think it was because i had dug a pit that i was overconfident about the slopes stability, as i couldn't see anything in the layers or consistency of the snow to scare me.  while it might be convenient to say i was "skinning under the influence of avaiusini" i have to admit i was the author of the ski area avy control bomb theory.  i guess that kind of settlement is somethi...
We skied the south slope, then into moonlight bowl and skied the far skiers right of the bowl, that starts in the trees (not quite yet in the full open, but fairly steep at the start).  Then we did the run with the slide, and then two more runs from where the trees start to get denser and the slope flattens to 20 degrees or so (about 400-500ft below the ridge top) down to near the PCT.

The conversations in our group were interesting, and there was definite disagreement on assumption...
Juan:
You are correct in your assumption.  The upper portion of the bowl, below the ridge (in a slight depression) is where the slide occurred.  Phil and Greg both took photos, maybe they can post one here...
Other than the one attempt to climb back to the ridge, we made all our turns on the lower angle gladed stuff and felt pretty good about that.

Fooman:
Our choice to ski there was a calculated risk and we were pretty aware of the conditions as well as the avy forecast.  Over t...
there are definitely some lower angle lines in moonlight bowl.  my main concern would be on some of the steeper sections directly below the ridge...these are more or less unavoidable if you ski off the top.  i ski there often, and based on what i was seeing in the trees there on friday, i would have avoided moonlight bowl altogether probably.  glad you guys had a good day though and it all worked out.  

Huh, that's interesting.

So you were skinning up on a day that was already forecast to be dicey, experienced frequent whoomps and a sizeable slide triggered by your presence but still got in 4000 feet?

You said yourself it was the sketchiest day you'd seen this season.

Where do you draw the line?  Whoomping is definitely when I turn back after having a similar experience but without enough volume to be really dangerous.

Would you have been surprised if you ha...
Great information.  I don't think the snowpack was quite as bad up at the Baker backcountry (Sat).  My stepson and I heard a few whoomps on some wind loaded areas heading up to the saddle.  We stuck to the trees heading south from Hermann Saddle and found fairly good skiing.  Tim and friends dug a pit and skied the Core shoot gully.   There was quite a bit of new snow but it was definately safe to ski on the south facing slopes in the trees.  Yesterday's warm temp a...
Conditions yesterday were some of the sketchiest I've been out in this year.  I wasn't going to bother reporting this, since the rain today will change everything - but we experienced extensive whoomphing on the south and east aspects we were on, and someone in our party remotely triggered a slab (about 100 feet away) with a 2-3 foot crown, which ran about 500 vertical feet - helped along by a second slab lower down the slope, which the weigh of the first presumably triggered.

But we foun...
Guess I was wrong, there was someone here crazy enough to ski the BC this weekend.

OT:  So this is my first year interpreting forecasts--Are we looking at some corn skiing this week?  Will "partly cloudy" be enough to soften things up?
There is some great skiing off of the Duffy Lake road.  Was the hut comfortable?  Last time I was there the stove was in sad shape and the hut was a bit tired and worn.  Great skiing aroung there however with some big terrain.  

Gregg
You gotta have good conditions in the trees for this one, which tends to mean a decent and recent dump of snow. I'm guessing the trees you encountered were either tree bombed, tree peed, or both, even if they had a small bit of powder on top.
Good to hear what the coverage is up there, Tony.
Thanks.
I use T3s, early model (so-called "brown", not the newer black T3s). I've got 3-pin+cable bindings on the skis but will most likely never take the cables along (never did with my Catamounts). Without the cables, the setup is pretty light but performed nicely.
Welcome to TAY Eli.  Glad you had a nice day.  Those were our tracks in the Slot from Saturday.  It was so nice we decided to yo-yo the bottom part, up to the top of "Little Slot", a smaller couloir that branches to climber's right and continues to 5600 ft or so.  We had similar conditions, except managed to avoid the breakable crust and concrete.  It was more like 3" of wet powder over corn below 4900 ft.
Funny - looks like everyone has the same ideas.  After a grim day at Snoqualmie Saturday I thought I would try Crystal b/c of the higher elevations.  But that thought was fleeting and I tried another area [which shall remain nameless] and that held very nice powder.  I guess I'm glad I avoided Crystal!
Kinda too busy?  You just got get out in front of the masses.  We managed to find good fresh turns all day in bullion(south facing in the trees) and cement basin (north facing) , but we did pass a couple of convoys on the way up and ended breaking trail.  Next time we'll leave even later.  The ultra-fat skis are nice on those heavy days, definitely worth the up hill price, when you're yoyo-ing for turns.  The ultra-fats lower your snow quality requirement for a good day....
Yeah I think I recognize that aspect. This is the slope into Union aiming at those small glades at the valley base, starting from the peak to lookers R of the low col on BB, right? The big party hit this slope and wasn't so hot at conserving the snow resource, they were all spread out and crisscrossing, so after we went down it once and saw them go down it in this manner we kind of gave up on the slope even tho it seemed possible (and you've confirmed) that there would have been lines in there i...
What type of boots are you using? I'm very interested in a similar setup for crusing around and for longer traverses. Did you use straight 3 pins or pins + cables?
Tlt Bindings:  spraying them helps.  I also carry a small pocket knive for sticking in the pocket to break up the snow that compacts there under certain conditions.  Having it in a pants pocket makes it quickly accessable.
We were a couple of the herd - although I only saw about 12 others. Dug  a pit on the east facing upper slopes of Union Creek got a RB4-5. A layer about 14" down slide, but couldn't move the rest of the column.  Did 2 runs on Union side - the "roller" set off by our skis tended to fan out and chunk up the slope, but the turns were pretty good.
Thanks, Wolfs.  I know how difficult it is to knock out a TR the same night you get home, but it is certainly helpful for us Sunday skiers to get some first hand info from the day before.  We DO appreciate it.

Sounds maybe like you were up in the BB area, eh?

As for your dynafit "snow under the toepiece crossbar" irritant, before you leave on a tour, just spray some slippery stuff in that little pocket (i usually use silicone) under the toepiece crossbar.  ...
Thanks... looks promising for some fun skiing...