Wind Slabs: Over the last three days moderate Easterly winds and heavy snowfall have loaded leeward terrain features above 2000’. Today light winds and a trace of new snow is expected. Should visibility allow for travel into the upper elevations, be aware of lingering wind slabs in steep terrain. Expect slabs to be 1-2’ thick and watch for cracking in the new snow. Hand pits and jumping on small terrain features and test slopes can be good ways to see how well slabs are bonding.
Cornices: Cornices have been growing to enormous sizes and will be tender today. Steer clear and don’t put yourself directly on or under a cornice. They can break much further back along a ridge than expected and their extra large size has the potential to trigger a lingering wind slab below.
A Cornice that has formed along “CFR” ridge above Common Bowl on Tincan, estimated to be ~15′ tall. The biggest its been all season.
Warm temps, rain and wet snow have been adding weight and stress to glide cracks throughout Turnagain Pass. These unpredictable hazards cover many steep slopes between 1000’ to 2500’ and continue to release without warning. Look for the large upside down ‘brown frowns’ and avoid hanging out directly underneath glides. Several glide cracks have released in the last few days including a new one on Sharks Fin.
Seattle Ridge is covered in large glide cracks that span most of the East Face along Turnagain Pass.
Southwest face of Sharks Fin as seen from the Seward Hwy yesterday. Exact timing of this glide avalanche is unknown, but likely in the last two days.
Freezing overnight temperatures are helping the lower elevations form a light crust and water continues to drain from a saturated snowpack below 1500’. Today daytime temperatures may reach the mid 30’s and wet loose avalanches will be something to monitor. If the snow is wet and slushy avoid steep terrain where loose wet snow has the potential to gain momentum and entrain deeper into the snowpack.
*Isolated snow and rain showers are in the forecast for today, but should the sun find its way through the clouds, be on the look out for wet loose activity in the mid to upper elevations. I know… this seems a little premature, but since the surface snow is light and dry, it doesn’t take much solar exposure to affect new snow.
Yesterday temperatures cooled to 32F at Turnagain Pass and light snowfall was observed during the day. Visibility was mostly obscured with a few periods of broken skies. Winds were light from the Northeast and ridgetop winds averaged in the low teens (mph.)
Overnight temps remained just below freezing and no new precipitation was recorded. In Girdwood light rain stopped around midnight and winds remained light from the Northeast.
Today scattered rain and snow showers are expected. Temperatures could rise into the mid 30’s F with light rain to 1500.’ Winds will be light from the Northeast and sky cover could clear off enough to see patches of sun by late afternoon.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||31||trace||0.1||101|
|Summit Lake (1400′)||33||0||0||30|
|Alyeska Mid (1700′)||32||3||0.39||87|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||27||~||~||~|
|04/19/21||Turnagain||Avalanche: Triangle, Seattle creek||Will Morrison|
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/18/21||Turnagain||Observation: Seattle Ridge, approximately 300 yards south of the up track||Brent Byrne|
|04/17/21||Turnagain||Avalanche: Road obs||Johnston-Bloom / Moderow Forecaster|
|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|
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.