GNFAC Avalanche Advisory for Thu Mar 29, 2012
Not Current Advisory
Good Morning. This is Mark Staples with the Gallatin National Forest Avalanche Advisory issued on Thursday, March 29 at 7:30 a.m. Gallatin County Search and Rescue, in cooperation with the Friends of the Avalanche Center, sponsors today’s advisory. This advisory does not apply to operating ski areas.
Overnight 1-2 inches of snow fell and temperatures dropped into the high teens to low 20’s F. This morning winds were blowing 5-10 mph from the SW with gusts of 20 mph. Today’s weather will bring a mix of clouds and sun with some precipitation this afternoon and tonight. By afternoon winds will increase and blow 15-20 mph from the SW with gusts of 40 mph. Temperatures will climb into the high 30’s and low 40’s F. Another inch of snow should accumulate by tomorrow morning.
The Bridger Range:
One week ago a major cycle of big,
Unfortunately last night’s cold temperatures did not freeze the wet
The Gallatin and Madison Ranges, the Lionhead area near West Yellowstone and the mountains around Cooke City:
This situation is not much different in other areas which have a similar layer of
What happens next depends on the weather. Heavy snowfall could simply stress the
Additional thoughts on wet
- Skier or snowmobile compaction doesn’t matter. Avalanches at Bridger ripped out some of the most skier compacted areas on the mountain.
- We do not fully understand wet
slabavalanches, thus we have a high degree of uncertainty. Also, the consequences of being caught in one of these wet slabavalanches would be fatal. The combination of high uncertainty with high consequences should weigh heavily in our decision making.
slabavalanches are problematic this year because of the depth hoarnear the ground. This layer produced many dry slabavalanches. Now it is moist and even weaker.
- Small, inconsequential looking point release avalanches can
I will issue the next advisory tomorrow morning at 7:30 a.m. If you have any snowpack or avalanche observations, drop us a line at firstname.lastname@example.org or call us at 587-6984.
Avalanches: Decision-making and Psychology
On March 28 the GNFAC and Friends hosted a Professional Development Workshop on "Decision-making and Psychology". All six lectures are uploaded to YouTube. Making high consequence decisions in dynamic, dangerous environments is tricky stuff. These lectures are by an avalanche worker, forecaster, SEAL, airline pilot, and psychologist. Watch, listen and learn. You can view the lectures here: http://www.youtube.com/playlist?list=PLEFAE2148A0027DF6&feature=view_all
Free avalanche beacon instruction. Grizzly Outfitters, Saturday, March 31st, 3-5 p.m.