Sunday, December 8th 2013 6:24 am by Wendy Wagner
ARCHIVED ADVISORY - All advisories expire after 24 hours from the posting date/time.
We continue to have an overall LOW avalanche danger in the mountains surrounding Turnagain Pass. Pockets of MODERATE danger may develop mid-day with surface warming on sunny slopes. Human triggered avalanches are unlikely except in isolated areas where wet point release avalanches may become possible. These isolated areas are steep (more than 40deg) slopes with a southerly aspect.
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During the past two days we have seen a handful of wet point release avalanches due to our unseasonably warm spring-like weather. Yesterday they were confined to steep sunny slopes during the middle part of the day where the sun - yes, even as low as it is right now - was able to melt the surface crusts. Similar conditions should be on the radar today. This is a fairly straightforward avalanche problem to manage. Steer clear of any steep slope with wet, mushy and unsupportable snow. The clear skies overnight have likely refrozen the melted surfaces from yesterday but the sun coupled with the ambient above freezing temperatures may be enough to melt these southerly aspects again.
Photo below is a wet point release avalanche on Tincan from yesterday 12/7 (SW, 3,500'). VIDEO HERE.
The slope has to be quite steep (over 40deg) for these avalanches to initiate but once they do they can gain enough momentum and run quite far. Debris can also be funneled through steep gullies and this can become a very real hazard for ice climbers. A report was sent in from the Portage Valley on Friday of an older debris pile near a popular ice climbing area.
Valley fog covers most low-lying areas this morning as it did yesterday. Above the fog, skies are mostly clear and temperatures warm, in the 30'sF. Sunburst is reporting 38F at 6am and should remain in the 30'sF for the day along with most mid and upper elevations. Skies should be sunny today - again, above the fog - and winds light from the west.
This should be the last day of spring-like weather. Starting Monday cooler temperatures move in and Tuesday we have a chance for a few flurries as a weak system brushes by us from the west. It does not look like we will accumulate much in the order of snow with this system.
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: May 06, 2018 )
|AREA||STATUS||WEATHER AND RIDING CONDITIONS|
|Johnson Pass:||Closed||Closed as of April 20th|
|Placer River:||Closed||Closed as of April 17th|
|Skookum Drainage:||Closed||Closed as of April 1st.|
|Turnagain Pass:||Closed||Closed as of May 7th. Happy summer, see ya when the snow flies!|
|Twentymile:||Closed||Closed as of April 13th|
|Carter Lake:||Closed||Closed as of 4/27|
|Lost Lake Trail:||Closed||Closed as of April 13th|
|Primrose Trail:||Closed||Closed as of April 13th|
|Resurrection Pass Trail:||Closed||Closed as of April 20th|
|Snug Harbor:||Closed||Closed as of 4/27|
|South Fork Snow River Corridor:||Closed||Closed as of April 13th|
|Summit Lake:||Closed||Closed as of April 20th|
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