Up to 4 inches of new snow combined with 20-30 mph ridgetops winds from the Northeast are expected today. This will continue to make human triggered slab avalanches likely on steeper slopes.
Two days ago a storm left 2’ of new snow blanketing all of Turnagain Pass to the roadside. This slab is sitting on a weak layer of faceted snow that exists both in the Alpine and at Treeline. Yesterday conditions were very tender and a handful of slab avalanches released naturally due to unusually warm temperatures on sun-affected aspects (East and South facing slopes.) Two separate skier triggered slabs were observed on Tincan below 2500’. One of these incidents was remotely triggered causing a large pocket 200’ wide to run about 500’ down the slope.
Today avoid all steep slopes, even small ones with terrain traps below. Remotely triggered avalanches are possible and it will be extra important to not put yourself in the run-out of a steep slope, especially if other backcountry users are in the area. Obvious signs of instability like collapsing and recent avalanche activity will be additional reminders today to keep it mellow!
Yesterday was a classic example of why CONSIDERABLE is the most dangerous rating for humans. 2’ of fresh powder followed by a sunny warm day and multiple parties pushing slope angles into steeper terrain. The photo below is of a remotely triggered slab avalanche on a WSW aspect of Tincan. Luckily no one was caught or injured.
Ridgetops winds from the Northeast are expected to be moderate 20-35 mph throughout the day. Windslabs 4-8” are possible on leeward aspects of terrain features. These wind slabs are an additional reason to stay off of steeper terrain while small bursts of precipiation and wind move through Southcentral Alaska over the next two days.
Yesterday skies became clear and temperatures were in the mid 40’s F at lower elevations. At ridgetops temps stayed cooler, mid 20’s F and winds were light 10-20 mph from the ENE. No new precipitation was recorded.
Overnight cloud cover kept temperatures on the warmer side, above freezing at lower elevations. Ridgetops remained in the mid 20’s F. Winds picked up along ridgetops and Sunburst was averaging mid 20’s mph from the ENE since 1am.
A low pressure centered over the Alaskan Peninsula is set up nicely to send several bursts of precipitation to Southcentral Alaska over the next two days. Expect warm temperatures, mid to high 30’s F near sea level. Rain/snow line should be near 500′. Today 4 € is expected to fall at higher elevations with an additional 2-3 € later in the evening. Ridgetop winds will be moderate 20-30 mph from the NE.
*Wind data was only available at Seattle Ridge Wx station after 12am.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||35||0||0||57|
|Summit Lake (1400′)||31||0||0||16|
|Alyeska Mid (1700′)||34||trace||.01||37|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||28||*N||*11||*28|
|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|
|04/10/21||Turnagain||Observation: north sides||lance breeding|
|04/09/21||Turnagain||Observation: Girdwood to Turnagain Road Observations||W Wagner Forecaster|
|04/05/21||Turnagain||Avalanche: Resort bowl Seattle creek head wall||Clint Kyffin|
|04/04/21||Turnagain||Observation: Center Ridge||Andy Moderow|
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.