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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...
Phil, here's a shot of Aix, or at least that part of Nelson Ridge that leads to Aix:



Just looking at Green Trails, there are a few chutes that reach clear to the valley floor, and that was also my impression although I did not scout it out as well as should be done.
There are chutes galore for those inclined/ capable- easily accessible.  Aix and the ridge shoot up directly from the valley floor so there is potential even right there from the TH- very steep stuff.  I think I may have one revealing shot but let me finish the roll and if its decent, that will fill the one photo quota for this thread.

Its a neat area that gets tons of snow.  I sure could have used "'bilers for Nader" along to break trail for us.
thanks to all of you for your help and tips. They definately made my transition smoother, and Daryl your tips came into play the next day as I skied alot more and your right let em run a little and they turn alot nicer they are telly skis after all.
I've always wondered about the ski potential around Bumping Lake (never been there).  What's the terrain around Mt Aix like?  Is it a long way from the valley bottom to skiable/open terrain?  Did you take any pictures?
Hey wow - I was doing my training run up Hyak on friday when a jet fighter flew over the ridge, proceeded BELOW ME up Gold Creek in a haze of his own jet exhaust and pulled up in a dramatic fashion at the face of Chikamin, shadow on the face of the mountain and all.  For a moment I thought I was going to see this guy buy it.  What a sight.

Guess we know how the fly boys get their kicks!

Maybe he was looking for a new personal discovery zone!...
Yeah, I was buzzed on Friday, a little after noon.  Wonder if it was the same pilot?  McChord AFB?  Those are impressive maneuvers, eh?

Preceeding that, the snowplow operator came by.  I chatted with him awhile, then the local uniformed USFS dude pulled up and I chatted with him awhile.

I was starting to feel like it was "get buzzed by government dudes" day.
Thanks, Darryl.
And I thought your tips were GREAT!
I'm gonna work some more on them this next Sunday!
Lowell, you are certainly a rare treasure for us all here in the PNW.  Thanks for all your work.
Very cool trip, Greg.
Thanks for sharing it.
Brent - I was at Paradise on Sun.  It was windy with a considerable avalanche danger.  Lots of wind loading.  We skied into the Nisqually morraine and then over to Edith Creek.

The Glacier Travel course is starting if you have an interest in sharing your experience.
Jerry and Ron - great photos!!  I'm standing up in all of them.  It was a fun trip!  I think if I wouldn't have confused Stefan (and myself) with all the telemark tips, he would have skied even better than he did.
You had some good weather for your tour Lowell - I was participating in my son's Birthday Party on Sunday but at least I got to ski since the party was at Alpental! I was tempted by your earlier partner request - maybe next year?

A time of 4:37 is certainly fast, especially considering the fact that it is hard to wax for our typically wet snow. Compared to AT gear though the light nordic stuff excells in mild terrain (lighter, longer stride, glide on low angle climbs...). I have skated th...
Seems like bc skiing is a virtual plethora of firsts.  Even if you did the same route every day the conditions change so much day to day that each tour's totally unique.  Then when you add to the mix, a boarder (who has NEVER skied) that goes back to the car to get his new skis to ski with you, it's quite memorable, eh?
Well done, Stefan.
And to add to that, We had a virtual smorgasboard of snow conditions... albiet all skiable.  Here's one of JW having his way with the sast...
Hi, Darryl. Haven't seen you in a while. Well I didn't lead the Saturday trip. My choice was Paradise area with the hope being the sun would have good effects on the crust. RogerF did go to Paradise on Saturday and did find decent skiing. Even though it took his party most of the day to discover it. We went to 'somewhere in the Crystal backcountry' on Sunday and found great snow. But we had inspired leadership (again, I was not the leader!).
Wow.... those guys were obviously serious hard men!  Did they travel on skins, or just run up the peaks?


I think they used wax. The gear they used was, I think, similar to what in the 1970s was considered heavy duty Nordic gear, but today would be considered way too flimsy by most backcountry skiers.  Here's a picture that I found in the Mountaineers dungeon (at the clubhouse) that I believe depicts Sigurd Hall at the end of the Patrol Race...
Thanks for the history lesson, Lowell.  Always an interesting read.  It's great to hear the day worked out well.