Weak snow that has been buried for 3 weeks continues to lurk 1-2 feet below the surface. This layer has gained significant strength in that time. Bonding between the “late January” facets and overlying slabs has improved to the point where it has become difficult to trigger an avalanche on this layer. Some intermediate weak layers can be found in isolated locations and are buried about 1 foot deep. Slabs resting on these layers are also generally difficult to trigger. Tests have been showing propagation potential on the decline, but it is still possible for an avalanche, if triggered, to propagate across portions of slopes.
Despite these improving trends it is still important to treat steep and complex terrain with suspicion in the Alpine. Today it will be important to follow good travel protocol. Assess the terrain you are on and minimize your exposure accordingly. Avoid trigger points on terrain over 35 degrees, travel one at a time on suspect slopes, use islands of safety and communicate your decisions and plans within your group.
Ridgetop winds have been in the 20-30 mph range since yesterday morning. Very shallow stiff slabs may be encountered today on steep (40 degrees and over) leeward slopes. These slabs will be small, around 4-6” deep and exist in small pockets. While the volume of any wind slabs triggered will be low, it will be important to avoid them when travelling above terrain traps such as cliffs, gullies and trees.
The past 24 hours saw mild temps with moderate ridegtop winds. Skies were mostly cloudy and less than a trace of new snow fell in the upper elevations.
Today expect more of the same. Winds will be out of the East at 15-20 mph. Very light snow under mostly cloudy skies will fall with a max of 2 € of accumulation. Rain/snow line will be around 1,000′. Temperatures at 1,000′ will be in the low to mid 30s F.
The extended outlook is showing a continuation of showery precipitation through the week, as a series of weak lows move through the area.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||34||0||0||40|
|Summit Lake (1400′)||34||0||0||7|
|Alyeska Mid (1700′)||34||trace||.06||22|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||26||NW||29||59|
|04/21/21||Turnagain||Observation: Sunburst||Schauer/ Behney Forecaster|
|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|
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.