The persistent slab is a problem that doesn’t go away quickly. The last major storm was on Sunday, almost a week ago. Since that storm, when many large avalanches were recorded, we haven’t seen a lot of avalanche activity. This is mostly due to a lack of triggers (people) in the backcountry this week. However, the problem has been bad enough to warrant an extended stretch of elevated danger ratings. Our test pits performed every day this week have not shown appreciable improvents in the strength or propagation potential of the snowpack. Check this video for a test done yesterday on Pete’s North.
It’s worth recapping some of our recent avalanche activity to pick out the trends. Avalanches have been triggering remotely, often from ridges and propagating across large distances. Wind blown ridges offer a trigger point where the snowpack is shallow and a person’s weight is more likely to collapse the buried weak layer. In deeper areas, a collapse may still be caused by a larger trigger such as a snowmachine or a group of people. Avalanches have been observed on all aspects (N, S, E, and W), and elevations from just below treeline to >3500 feet. Few people have ventured into higher elevation steep terrain, which is a good self-preservation tactic right now.
Standard warning signs such as whumphing, shooting cracks, or avalanches on small indicator slopes are unlikely right now. Avoiding steep terrain is the only effective management tool we have to deal with the current problem.
No new snow has accumulated in the last 24 hours. The last major storm ended on Sunday. This week has been mild weather with warm temperatures, little precipitation, and light wind.
Today we can expect mostly cloudy skies, highs in the mid 20s. Mostly light wind.
The next storm system may arrive by the middle of the coming week. Stay tuned.
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/17/21||Turnagain||Avalanche: Road obs||Johnston-Bloom / Moderow Forecaster|
|04/16/21||Turnagain||Avalanche: Seattle Ridge||Wendy Wagner Forecaster|
|04/16/21||Turnagain||Avalanche: Turnagain Pass, non-motorized side seen from Seattle Ridge||CNFAIC Staff Forecaster|
|04/16/21||Turnagain||Observation: Sunburst||Lance breeding|
|04/15/21||Turnagain||Observation: Tincan||Schauer/ Rothman Forecaster|
|04/13/21||Turnagain||Observation: Turnagain Pass Road Obs||A Schauer Forecaster|
|04/12/21||Turnagain||Observation: Tincan||Johnston-Bloom / Latosuo Forecaster|
|04/10/21||Turnagain||Observation: north sides||lance breeding|
|04/09/21||Turnagain||Observation: Girdwood to Turnagain Road Observations||W Wagner Forecaster|
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: email@example.com
|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.