A 1-2+’ slab sitting on top of a widespread layer of buried surface hoar continues to warrant caution in the alpine throughout Turnagain Pass. This layer was formed in mid November and was the cause of dozens of human triggered avalanches over several weeks. Observers continue to find this layer on all aspects above 2000’ and many stability tests still show propagation potential. However without any major weather factors adding stress to the snowpack this layer is becoming more stubborn and difficult to trigger with time. The places most suspect are large steep slopes (>35 degrees) that haven’t avalanched. Since we don’t have X-ray vision of the entire snowpack and evidence of natural avalanche activity was limited during several storms, uncertainty exists in terrain that hasn’t seen much traffic. The presence of surface hoar within the snowpack should be part of your slope choices today especially if you are venturing into steeper untracked areas. Consider the consequences of an avalanche before committing to a route and always use safe travel protocols.
Several wind events over the last week have formed wind slabs near and below ridgetops on a variety of aspects. Stiff supportable wind slabs formed in thin rocky areas may pop once you are out onto the slab. Be wary of hard over soft snow, hollow sounds and steep slopes with obvious deposition in the start zone.
Yesterday was overcast with low temperatures around 15F and highs around 23F. Winds were calm. No new precipitation was recorded in Turnagain Pass, and an inch of snow fell in Girdwood overnight.
Today skies will be mostly sunny with a chance of light snow showers. Expect light ridgetop winds to be shifting from the East to a more Northerly direction and temperatures will be in the teens (F) to low 20F’s.
A similar pattern is expected into the weekend with temperatures dipping back into the single digits and possibly cooler.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||21||0||0||19|
|Summit Lake (1400′)||16||0||0||4|
|Alyeska Mid (1700′)||18||.05||1||8|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||23||ESE||1||2|
|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.