Sunday, January 29th 2012 6:57 am by Kevin Wright
ARCHIVED ADVISORY - All advisories expire after 24 hours from the posting date/time.
The avalanche danger is MODERATE in specific wind loaded pockets in steep terrain. We saw one example on Friday of a significant avalanche in a cross loaded South facing gully. Much of the region where most people are skiing, on terrain up to about 38 degrees, has a LOW avalanche danger.
No major news yesterday is keeping the status quo in the backcountry again today. Saturday was a busy day in Turnagain Pass, with skiers and riders stepping it up a notch in terrain. Sluffing looks to be manageable, although still a factor in steep terrain. Pockets of wind slab are found in the usual areas - near ridgetops and rollovers. We neither saw nor heard of any significant avalanche yesterday like the one from Friday.
Primary Concern Wind loaded pockets in steep terrain.
Larger pockets that might have the ability to propagate into a larger avalanche seem to be rare, but not unheard of. The wind event on Thursday, with ridgetop gusts to about 35mph, formed some slabs of stiffer and cohesive snow. This picture is what we are most concerned about today. Read a description of that avalanche here. The possibility of finding a pocket like this is diminished compared to Friday when that avalanche happened. Despite the infrequent nature of this problem, its worth staying vigilant in case you come across something similar. Watch for stiffer snow in areas steeper than 38 degrees.
Secondary Concern Loose snow sluffing and smaller wind slabs.
This is only a hazard to people in steep and high consequence terrain. We have found the sluffing to be generally manageable and predictable. Small wind slabs are somewhat less predictable than the sluffing, and the manageable nature depends completely on the terrain exposure below. Watch for these areas of stiff surface snow in the top 4-6 inches. Youll know it when you feel it.
New surface hoar formed over the last 2 days all the way to some ridges. This is not a problem now, but could be when it gets buried by the next storm. Stay tuned for further developments
A temperature inversion remains in place over most of the region. Skiers and riders yesterday who toughed out the cold at the parking lot and pushed up to sunny ridges were rewarded with comfortable calm conditions up high. Valley bottoms are still negative temps this morning, with positive single digits higher up. Wind is predicted to remain minor again today with mostly cloudy skies.
There is a chance of snow tonight, with increasing possibilities over the next couple days.
CNFAIC Weather Page and the NWS forecast
Wendy will issue the next advisory Monday morning. If you get out in the backcountry we want to know what you are seeing. Please send us your observations using the button at the top of this page or give us a call at 754-2369. Thanks and have a great day.
|Show the Complete North American Avalanche Danger Scale|
This is a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area (this advisory does not apply to highways, railroads, or operating ski areas).
Riding status is not associated with avalanche danger. An area will be open to motorized use in accordance to the Forest Management Plan when snow coverage is adequate to protect underlying vegetation. Backcountry hazards including avalanche hazard are always present regardless of the open status of motorized use areas.
(Updated: Mar 20, 2019 )
|AREA||STATUS||WEATHER AND RIDING CONDITIONS|
|Placer River:||Closed||Closed as of 3.20.19 due to lack of snow.|
|Skookum Drainage:||Closed||Placer access closed as of 3.20.19 due to lack of snow.|
|Twentymile:||Closed||Closed as of 3.20.19 due to lack of snow.|
|Lost Lake Trail:||Open||Please stay on trail to avoid resource damage through forested areas.|
|Primrose Trail:||Open||Please stay on trail to avoid resource damage through forested areas.|
|Resurrection Pass Trail:||Closed||Closed for the 2018/19 season. Next season will be open to motorized use.|
|South Fork Snow River Corridor:||Closed||Closed as of 3.20.19 due to lack of snow.|
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