For the majority of the day the main hazard will continue to be associated with early season conditions; breakable crust and rocks lurking just below a thin layer of new snow. These are legitimate hazards and require extra time moving through terrain.
A small amount of new snow (~2” on Turnagain Pass and ~4” in Girdwood Valley) coupled with moderate winds out of the East, have created very shallow slabs in upper elevation starting zones. Slabs are low volume this morning.
As the day progresses, new snow will begin to form slabs that will be very sensitive to human triggers. The old snow surface consists of pockets of surface hoar sitting on a thin crust. In areas sheltered from the wind new snow will sluff easily and should run long distances. Again, these concerns will become more pronounced later in the day. Should you find yourself out in the mountains as daylight wanes it will be worth avoiding higher elevation starting zones and steep terrain harboring newly formed slabs.
The dry spell is over. The mountains around Eastern Turnagain Arm have picked up between 1-4 € of new snow with .1-.2 € of water in the past 24 hours (slightly greater amounts in the Girdwood Valley). Ridge top winds have shifted overnight and are now blowing out of the East at an average of 15 mph with gusts to 30 mph. Temperatures have been in the single digits and are starting to creep up into the low teens.
A large low pressure system that is currently to our South is moving north into Prince William Sound. As this system gains strength and moisture it will begin to scatter snow showers over the forecast area around midday. Look for snowfall to pick up in intensity by late afternoon with the potential for an additional 8″ new snow by this evening. Winds will be out of the East at 15-20 mph and temperatures at 1,000′ will warm up into the twenties F.
This system will bring continued snow as well as fluctuating temperatures over the weekend. Look for the avalanche hazard to increase as new snow, wind and warming temps form new slabs on top of a weak snowpack.
|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.