The old surface that we were skiing a week ago is the current weak layer, with the November 21st storm snow failing on those loose faceted grains. See this observation for a detailed look at the snowpack structure. Since the storm on Friday we have had 3 decent avalanches reported to us, and keep in mind that few people are skiing south of Anchorage right now. All of these avalanche events are behaving in a similar nature, breaking on the storm interface from November 21st. The storm snow is heavier and denser than the underlying layer of weak faceted snow, making this failure easy to identify in snowpit tests. Reports from a couple days ago were identifying failure on isolation or with very light force.
The picture below is actually from the Summit Lake area, but shows a similar problem farther south on the Kenai. See this observation for another picture from that reported avalanche.
We expect this kind of avalanche potential to stay for a little while longer. Time, warm temperatures, and continued storm cycles will eventually fix the problem. Until then, caution is warranted when deciding where to go right now. Also keep in mind that the snowpack is shallow. Rocks and trees are barely covered, if at all.
There is no new snow in the last 24 hours. Temperatures are in the high 20s. Wind is light.
The National Weather Service continues to have light snowfall in the forecast. 1-3 inches of snow is possible today as a weak surface low enters Prince William Sound this morning.
Temperatures will stay near freezing in the mountains and perhaps rising above freezing near sea level. Wind will stay light and variable, 10-20 mph.
|01/31/23||Turnagain||Observation: Johnson Pass area||Megan Guinn / W Wagner Forecaster|
|01/29/23||Turnagain||Observation: Tincan Backdoor||AAS-Level 1 1/27-1/30|
|01/28/23||Turnagain||Observation: Sunburst||Brooke Edwards|
|01/28/23||Turnagain||Avalanche: Seattle Ridge||W Wagner|
|01/28/23||Turnagain||Observation: Tincan Common||Tony Naciuk|
|01/27/23||Turnagain||Observation: Sunburst||John Sykes|
|01/27/23||Turnagain||Avalanche: Lynx Creek||Megan Guinn / W Wagner|
|01/25/23||Turnagain||Observation: Cornbiscuit||John Sykes Forecaster|
|01/22/23||Turnagain||Avalanche: Tincan||Schauer/ Guinn|
|01/21/23||Turnagain||Avalanche: Seattle Ridge||Elias Holt|
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.