Even light snowfall adds up over time and can become a probelm. About 6 inches have fallen in Turnagain Pass and Girdwood in the last 24 hours. Overnight wind was strong enough to transport quite a bit of snow. Yesterday the surface snow up high was getting a “slabby” feel. Even without any prominent weak layers, recent loading has the ability to build pockets of avalanche potential.
Last night there was a natural avalanche reported near Kern creek just south of Girdwood that was large enough to affect the railroad. This underscores the potential for more avalanches to happen despite only moderate amounts of new snow. High wind yesterday played a large role in causing this avalanche.
Wind loading at higher elevation will be the most likely place to find trouble today. Expect deeper and stiffer snow on west aspects with cross loaded north and south facing slopes.
A series of ice crusts with associated weak layers have kept us thinking about the lower to mid elevation snowpack. A couple days ago forecasters found collapsing and unstable pit results at 1200 feet elevation. As we open the low elevation zones of Placer/Skookum and 20mile to snowmachines, this should be a concern to think about.
The Placer/Skookum/20mile zones are poorly understood at this time due to a lack of information. Expect to find moderate avalanche danger, but remember that those zones get different weather patterns and local variations may be found.
The last few days have been consistent light snowfall with wind up high. Yesterday and overnight new snow built to around 6 inches at mid elevations in Girdwood and Turnagain, and double that amount in Grandview. Wind has gusted 40-50+ mph every hour since yesterday morning at Sunburst. Temperatures have been in the 20s at high elevation to mid 30s at sea level.
Expect more of the same weather today. A large low complex south of Kodiak is affecting our region with snowfall across the gulf coast spilling over to Turnagain Arm. Total precip will be a little less than yesterday and wind may diminish slightly as well. The forecasted snow doesn’t look like a big addition to the avalanche danger, but reduced visibility may hamper our ability to see very much today.
Graham will issue the next advisory tomorrow morning, Feb 27th
|05/22/23||Turnagain||Avalanche: Tincan||Nick D'Alessio|
|05/12/23||Turnagain||Avalanche: Tincan, Sunburst, Magnum, Cornbiscuit||Heather Thamm|
|05/07/23||Turnagain||Observation: Tincan – Bear Tracks||CNFAIC Staff|
|05/05/23||Turnagain||Observation: Seattle Ridge||AS/ WW Forecaster|
|05/02/23||Turnagain||Observation: Cornbiscuit||Schauer/ Sturgess Forecaster|
|05/02/23||Turnagain||Observation: Seward Hwy Turnagain Pass||Joel Curtis|
|04/30/23||Turnagain||Observation: Magnum||Ayla, Kit Crosby, Barton|
|04/29/23||Turnagain||Observation: Tincan||John Sykes|
|04/28/23||Turnagain||Avalanche: Taylor Pass/Pastoral||Schauer/ Creighton Forecaster|
|04/28/23||Turnagain||Avalanche: Tincan||Andy Moderow|
Status of riding areas across the Chugach NF is managed by the Glacier and Seward Ranger Districts, not avalanche center staff. Riding area information is posted as a public service to our users and updated based on snow depth and snow density to prevent resource damage at trailhead locations. Riding area questions contact: firstname.lastname@example.org
|Area||Status||Weather & Riding Conditions|
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.