The last known avalanches were small wind slab avalanches that released 10 days ago during the 11/25-26 NW outflow wind event.
|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|
Another round of snow is on the way today, which will hopefully bring 1-2″ during the day and 8-10″ to the area by tomorrow morning. It is looking like precipitation will start to pick up later in the afternoon, with the heaviest snowfall this evening and tonight. Southeast winds are expected to increase as the precipitation starts, with average speeds of 10-15 mph and gusts of 25-30 mph by this afternoon. For today, this makes fresh wind slab avalanches the main concern. Over the past week, we have seen a healthy variety of surfaces, including facets, surface hoar, crusts, and firm wind slabs. As the weather picks up today, it will be possible for a person to trigger an avalanche 6-12″ deep where the wind is building fresh slabs on these old surfaces.
The most concerning terrain will be steep, higher elevation terrain below ridgelines, convexities, and in gullies. Safe travel will require identifying and avoiding slopes with stiffer wind slabs on the surface. You can quickly identify these as you travel by taking a minute to step off the skin track and poke around. If you notice that stiff snow sitting on top of soft snow, or any warning signs like shooting cracks, collapsing, or fresh avalanche activity, head to protected terrain where the wind isn’t building fresh slabs. That’s most likely where the best skiing will be found too.
Andy Moderow identifying a buried crust, with about 3″ of facets on the snow surface. That soft snow that has been faceting on the surface for the past week will be a layer of concern once it gets buried by the approaching storm. Photo: Peter Wadsworth, 12.04.2022
Yesterday: We ended up on the low end of the snow forecast yesterday, picking up only a trace to 2″ in the past 24 hours. Winds were 5-15 mph out of the south and east, with gusts of 15-20 mph. Skies were mostly cloudy and high temperatures were in the low to mid 30’s F. Most of the weather stations were showing the coldest temperatures yesterday morning, with temperatures in the 20’s F.
Today: Skies will be mostly cloudy, with chances for snow increasing later in the day. We should get 1-2″ snow during the day, with precipitation picking up as the sun goes down. Easterly winds are expected to increase to 10-15 mph with gusts of 25-30 mph by this afternoon. High temperatures should hover in the low 30’s F, with lows dropping into the 20’s tonight. The snow line is expected to drop to sea level as the storm picks up.
Tomorrow: Snowfall will slowly taper off during the day tomorrow, with another 6-10″ expected tonight. Unfortunately the northwest winds are expected to pick up as this low pressure moves out of the area, with average speeds around 15-20 mph and gusts around 30 mph by tomorrow afternoon. Skies will be mostly cloudy and temperatures will continue to drop into the high teens to low 20’s.
PRECIPITATION 24-hour data (6am – 6am)
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||31||1||0.1||24|
|Summit Lake (1400′)||27||2||0.2||16|
|Alyeska Mid (1700′)||31||1||0.15||19|
|Bear Valley (132′)||28||tr||0.07||–|
RIDGETOP 24-hour data (6am – 6am)
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||27||ESE||9||15|
|02/08/23||Turnagain||Observation: Eddie’s||Megan Guinn & John Sykes|
|02/07/23||Turnagain||Observation: Seattle Ridge||Wagner / Keeler Forecaster|
|02/07/23||Turnagain||Avalanche: Pete’s North||Megan Guinn|
|02/06/23||Other Regions||Observation: Johnson Pass to Bench Lake||Justin Siemens|
|02/05/23||Turnagain||Observation: Rookie Hill||Tony Naciuk|
|01/31/23||Turnagain||Observation: Johnson Pass area||Megan Guinn / W Wagner Forecaster|
|01/29/23||Turnagain||Observation: Tincan Backdoor||AAS-Level 1 1/27-1/30|
|01/28/23||Turnagain||Observation: Sunburst||Brooke Edwards|
|01/28/23||Turnagain||Avalanche: Seattle Ridge||W Wagner|
|01/28/23||Turnagain||Observation: Tincan Common||Tony Naciuk|
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.