|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|
Glide cracks are scattered throughout the advisory area and have been avalanching daily. Yesterday morning two new glide avalanches were seen in Turnagain Pass on Southwest aspects of Eddies and Corn Biscuit. In the early evening Magnum’s Southwest face had a fresh new glide avalanche. Glide avalanches are full depth avalanches that have the potential to be very dangerous. They are not associated with human triggers and occur spontaneously without warning. Glides can release even if a hard surface crust is present (unlike the wet loose and wet slab avalanche problems). Many glides are releasing in areas where folks are entering/exiting popular terrain. The best way to manage this problem is to identify them and avoid travel under their runout zone. Remember they can release at any time!
New glide avalanche on Magnum’s SW face released yesterday afternoon.
Corn Biscuit (left) has a lot of new glide cracks and a new glide avalanched overnight on Monday. Lipps (right) glide crack has widened significantly in the last two days.
Seattle Ridge has seen a lot of glide avalanches and wet avalanches over the last week and a half. Be aware that glide cracks are still opening up and have the potential to cross the uptrack, like one that released on Saturday.
LOOSE WET: Overall the possibility of natural wet loose and wet slab avalanches has decreased over the last two days. The snowpack has seen many days of a springtime melt-freeze pattern and many low to mid elevation terrain has shed (avalanched) a lot snow. In the Alpine, where night time temps have dropped well below freezing, a firm surface crust has formed. Today with daily warming and sunny skies there is still potential for a person, on skis or a machine, to trigger an avalanche in the afternoon/evening on solar aspects. If the snow surface breaks down and becomes wet and punchy, it’s time to get onto shaded slopes or off the one you are on.
CORNICES: Cornices are very large and direct sunshine can make them easier to trigger in the afternoon. Give cornices a wide berth and avoid travel directly below where one might fall.
South of Turnagain in Summit Lake and areas in the interior Kenai Peninsula have a very poor snow structure with variety of old weak layers within the snowpack. This poor structure is most suspect in the alpine above 3000’ – on shaded aspects any time of the day or on steep solar aspects late in the afternoon when surface crusts start breaking down. Triggering a persistent slab 2-3’ deep is becoming less likely with time, but not out of the question. In the mid and lower elevations where a stout crust as formed, monitor surface conditions and adjust your plans if the surface snow is unsupportable on Solar aspects later in the day.
Yesterday: Skies were sunny in the morning with high clouds moving in the afternoon. Temperatures reached the mid 40Fs in the mid and lower elevations. Ridgetop temps reached the mid 30Fs and dropped to the mid 20Fs overnight. Ridgetop winds were 5-15mph from the West. No precipitation fell.
Today: Skies will be partly cloudy to clear. Daytime temperatures are expected to reach the mid 40Fs in the mid and lower elevations. In the alpine daytime temps will be in the 30Fs and overnight will drop into the 20Fs. Winds are expected to be light from the Northwest with some areas seeing moderate NW winds (20s mph) like Turnagain Arm. No precipitation is expected.
Tomorrow: Skies could range from mostly cloudy with broken skies at times. There’s a chance for a few flurries in the alpine, but no accumulation is expected. Winds will shift to an Easterly direction and increase into the 10-20mph range in the afternoon. Saturday looks like our first opportunity for a storm to bring a few inches of snow to the alpine and rain showers to lower elations. Stay tuned!
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||37||0||0||66|
|Summit Lake (1400′)||36||0||0||21|
|Alyeska Mid (1700′)||38||0||0||58|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||34||WNW||2||10|
|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.