A widespread layer of surface hoar (that formed on November 15th/16th) is buried 10-20″ below the surface and continues to be reactive. Human triggered avalanches were reported again yesterday. That makes a full week of avalanches… persistent slab avalanches. Yesterday an observer noted being able to get out onto the slab and having it break above as them well as triggering a slope that already had multiple tracks on it. They also noted that it was hard to escape the fast moving slide. These are all reasons to have your guard up, not trust the snowpack and choose your terrain wisely. In addition, folks venturing to Magnum also triggered avalanches in terrain that has not seen traffic yet this season. There are still many slopes that could potentially slide in the Turnagain Pass area. Don’t let your quest to find fresh tracks lure you into a consequential avalanche. If you do go out today pay attention to the surface conditions. What will be buried by new snow? There is a new layer of surface hoar forming and the surface snow is also being weakened(faceting) due to the colder temperatures.
Again, things to keep in mind for the sunny day forecast:
The snowpack is still unstable, remote triggering is possible. Be on the lookout for shooting cracks.
Here is a little more information on Persistent Slabs and Travel Advice. This comes from the Utah Avalanche Center’s Avalanche Problem Toolbox, authors: Drew Hardesty and Wendy Wagner!
Skier triggered slide yesterday on Sunburst. Slope had previous tracks on it. Photo: Mike Records
There were two glide avalanches reported in the past two days and glide cracks are visible in the other pieces of terrain. Give these wide berth, minimize time spent underneath glide cracks and remember these are totally unpredicatable. They are not triggered by humans and are the entire snowpack releasing.
Sunburst glide avalanche and glide crack. This released sometime between Tuesday afternoon and Wednesday morning. Photo: David Evans
Yesterday was a clear sunny day in the mountains. Winds were light and temperatures were in the mid 20Fs. Overnight the temperatures dipped into the teens in valleys and winds remained light and variable.
Today will be similar with clear skies and temperatures in the 20Fs. WInds will pick up to 10-20mph from the NW. There will be increasing clouds overnight and a chance of snow showers.
Tomorrow will be mostly cloudy with snow showers, 0-3″ possible. This system is forecasted to linger and bring snow to the region into next week.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||24||0||0||18|
|Summit Lake (1400′)||14||0||0||2|
|Alyeska Mid (1700′)||27||0||0||2|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||26||variable||3||9|
|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.