All recent reported avalanche activity is related to a shallow wind slab in steeper terrain. That trend continues today with more wind slab expected with today’s weather. If you travel above treeline today, watch for wind drifting patterns related to slope aspect. One recent report indicated that the shallow wind slab wasn’t a major problem if anticipated. The danger will become greater as the depth and mass of those wind slabs increases today.
As the snowfall picks up today, combined with rising temperatures and wind, the chance of finding more wind slab will increase. By later tonight the storm snow by itself could be enough to cause concern without the wind component. The timing on the greater amounts of snow is expected for late tonight and tomorrow morning.
The deep slab problem has not been evident in more than a week. We believe it still warrants a minor discussion. Triggering deep slab at this time will require perfect placement and an element of bad luck. However, if that happens the consequences could be very bad. It’s worth considering this possibility in steep, shallow, and rocky terrain above treeline.
The last couple days have brought just a few inches of snow, but enough to maintain moderate avalanche concerns.
A weak front is moving across southcentral Alaska today, bringing snow to the mountains of Turnagain Arm. Temperatures are expected to rise, bringing mixed rain and snow to sea level this afternoon. Snowfall rates will increase this afternoon into Thursday morning, bringing between 8 and 18 inches to the mountains by tomorrow. Southeast wind will reach into the 30s and 40s up high.
|04/19/21||Turnagain||Avalanche: Triangle, Seattle creek||Will Morrison|
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/18/21||Turnagain||Observation: Seattle Ridge, approximately 300 yards south of the up track||Brent Byrne|
|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|
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.