View Full Version : Avi Homework
01-13-2007, 11:25 AM
Who has done their homework yet?
01-13-2007, 12:08 PM
weren't we going to get some more?
I did mine, but my dog ate it.
From what I remember, we were supposed to plan a trip into GOS.
01-16-2007, 01:02 AM
I'll make it easy for you: don't pitch tent in the slide runout ;)
My planning hits:
-topo + read the weather archives for the season
-plot slabs if any based on above
-identify suspect weather cycles that might produce strong layers over weak
-attempt to spot tent sites away from runnouts (thanks yuckster..I needed a good chuckle!)
-Identify safer tent site options if the above research indicates the GOS is showing considerable or above.
-Identify safer ski options (I have a few in mind) in case the GOS is showing considerable or above avi conditions
-attempt to get a meet-up plan so I can be ready to go when the people skinning in arrive
Check and clean/tune all my gear, incl. fresh batts and fresh spares all around.
Reconsider the entire trip due to the number of lunatics involed :D
01-16-2007, 11:37 AM
As the precipitation was changing from snow to ice pellets yesterday we had a period of fairly unstable snow. An unsuspecting climber triggered a slab avalanche as he traversed across the Headwall under the ice. He was carried a ways before self arresting just above a drop off. We talked to the individual after the event and he was grateful for acquiring such an experience without getting hurt. As he put it, "I will consider considerable next time!" (That area was posted at Considerable avalanche danger at the time.) Another climber triggered a slab avalanche below Harvard Bulge in Huntington Ravine. He reported that the crown line was about 3' deep and about 100 to 150' wide. He was also able to self-arrest and walked away from the incident. Around this time we were observing unstable slabs forming in the trees on the Lion Head Trail. We were seeing propagating fractures in slabs composed of small grained needles and ice pellets lying over newly deposited unconsolidated snow. This is a good example of how a change in the weather can affect stability very quickly. The early arrival of warm air aloft changed the precipitation type to a much denser crystal than what had fallen earlier in the day and, in addition to wind loading, created some very touchy conditions.
01-16-2007, 12:28 PM
Woah! Glad they are alright! This sugar-snow is NOT good and I fear it may be a big problem for the rest of the season even IF we get tons of snow on top.
Woah! Glad they are alright! This sugar-snow is NOT good and I fear it may be a big problem for the rest of the season even IF we get tons of snow on top.make that especially IF we get tons of snow
01-16-2007, 03:45 PM
I just don't get it. What part of considerable do people not understand?
Main Entry: 1con·sid·er·able
Pronunciation: -'si-d&r(-&)-b&l, -'si-dr&-b&l
1 : worth consideration : SIGNIFICANT <a considerable artist>
2 : large in extent or degree <a considerable number>
01-17-2007, 07:42 PM
Sometimes people think of considerable in terms of avalanche danger as minimal for some reason, but will always answer "YES" if you ask them if they would like considerable amount of money, good looks, sex, beer, fame, you name it.
I guess the point I'm trying to make is that sometimes people forget what considerable is when they look at the AVI scale of danger, and always seem to remember when its related to things people covet. But wouldn't you think one would covet their life more than anything? Scary when you analyze it.
I think it's general illiteracy. If the avi report was for a considerable amount of avalanche danger, people would be more likely to steer clear. As it is, people see consider able avalanche danger, they consider it and say, I think we're able to ski it. The terminology is well entrenched, but it sucks for the uninformed. Moderate danger is not insignificant, but it sounds, well, so goddam moderate; sort of like a mild day of weather. How could something so innocuous kill you? :rolleyes:
More people get out into the backcountry these days and not all of them are based in a avi-savvy community, physical or virtual. Not all of them are not entirely nonilliterate either. :confused:
01-18-2007, 03:25 PM
Not to take anything away from how the government runs the terror threat level but look at our current level. We are on High for all domestic or international flights....but that isn't going to stop anyone from getting on a plane is it?
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