|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|
East winds increased overnight and a few inches of snow fell. The winds are forecast to remain strong enough to transport snow today and the snow will continue with precipitation intensity peaking in the afternoon. Expect this combination of snow and wind to form sensitive wind slabs on top of weak snow surfaces. During the past week, we have seen near-surface facets and surface hoar develop all the way up to ridgetops. Prior to this storm the weak snow was sitting on top of stiff old wind surfaces and sun crusts, and this has the potential to be very sensitive to triggers now that it is buried. If the weather forecast verifies and we actually get a foot of snow by this afternoon, human triggered avalanches up to 2′ will be likely in wind-loaded terrain in the Alpine. Natural avalanches may also occur at upper elevations. It is really important to pay attention to changing conditions.
What to watch out for if you’re headed out today:
Remember, expect any wind slab you find to be sitting on weak faceted snow and/or surface hoar and poor bonding is likely. There is also a chance a persistent slab avalanche could be triggered if an avalanche triggered near the surface overloads the older weak layers in the upper 1-3’ of the snowpack and steps down creating a larger avalanche.
Sluffs: Steep slopes that are sheltered from the wind have 2-6” poorly bonded snow on the surface, which makes it easier to trigger dry loose avalanches (sluffs). Be aware of the potential for sluffs to gain volume and speed in steep terrain, since these can be dangerous if they knock you off your feet or your machine.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880')||29||3||0.3||110|
|Summit Lake (1400')||28||1||0.1||45|
|Alyeska Mid (1700')||28||3||0.2||114|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400')||22||E||12||27|
|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: email@example.com
|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.