|Signal Word||Size (D scale)||Simple Descriptor|
|Small||1||Unlikely to bury a person|
|Large||2||Can bury a person|
|Very Large||3||Can destroy a house|
|Historic||4 & 5||Can destroy part or all of a village|
Today should be our last day of cold temperatures before our weather does a complete 180 on us. A large scale system with strong southerly flow is headed in this evening and will bring considerably rising temperatures, gale force winds and heavy precipitation through the weekend. Rain could make it above 2,500′ by Sunday and another pulse looks to pump more warm air and moisture in for Monday and Tuesday. After today, expect rising avalanche danger, wet soggy snow along Turnagain Pass, and if we are lucky, the rain line will not reach our ridgetops. Stay tuned for more details on precip numbers tomorrow morning.
For today however, we are still in a similar avalanche pattern. Our main concern is at the upper elevations above 3,000′ where a person could trigger an avalanche 2-3′ thick breaking near the ground. If skies are clear enough to travel above 3,000′, keep in mind there is a potential weak layer of facets lurking under you. There could be no signs of instability before a slope cracks and releases. Unfortunately, snowpack tests continue to show reactivity in a weak layer of facets just above hard crust. This is keeping our hackles up on high alpine slopes.
High elevation terrain, pictured above, is where our avalanche concerns exist.
Snow pit at 3,200′ on Sunburst shows a thinner section of the snowpack (2.5 feet total depth) and thinner section of the slab (1.5 feet). This pit had the most reactive and concerning stability test results and tells us this layer of faceted snow could create an avalanche.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880')||18||0||0||15|
|Summit Lake (1400')||15||0||0||9|
|Alyeska Mid (1700')||17||0||0||18|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400')||N/A*||N/A*||N/A*||N/A*|
|05/18/21||Turnagain||Observation: Tincan Ridge||Joe Kurtak|
|04/30/21||Turnagain||Observation: Sunburst||W Wagner Forecaster|
|04/27/21||Turnagain||Observation: Tincan Ridge||Joe Kurtak|
|04/26/21||Turnagain||Observation: Magnum||Creighton/ Hoople|
|04/25/21||Turnagain||Observation: Sunburst||Nick D'Alessio|
|04/24/21||Turnagain||Observation: Airplane obs||Johnston-Bloom / DiJulia /Hilliard Forecaster|
|04/24/21||Turnagain||Observation: Corn biscuit||Heather Johnson|
|04/23/21||Turnagain||Avalanche: Lynx Ck Drainage||W Wagner Forecaster|
|04/23/21||Turnagain||Avalanche: Sunburst||Eeva Latosuo|
|04/23/21||Turnagain||Observation: Center Ridge Turnagain pass||Joe Kurtak|
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.