Snowpit information again yesterday points toward a layer of weak, faceted snow that is still showing signs of mischievous behavior above about 2,500’. This is roughly where the stout and supportable melt/ freeze crust begins to thin out enough for a skiers weight to physically upset these buried facets.
We found a high degree of variability across any given slope yesterday with unstable snow (moderate strength, high propagation potential) in one snowpit and generally stable snow just 15 feet away. This points toward a slab that is not widely connected across slopes. Of course snowpit data is just one small piece of the puzzle and it’s possible that someone could get away with skiing bigger, steeper lines without incident today but it is worth keeping in mind the nature of a persistent weak layer. It often takes weeks or even months for these to heal. The general rule for a facet is that once buried, it is not to be trusted until ‘it’s in the River’.
It is still important to treat steep and complex terrain with suspicion today. Practice safe travel protocol, assess terrain before committing and minimize your exposure accordingly. Avoid trigger points (thin spots or steep roll overs) on terrain over 35 degrees and travel one at a time on suspect slopes using islands of safety as you go.
We were finding a high degree of variability across slopes, even in snowpits this close together. More info on the NEW OBSERVATIONS PAGE!
Yesterday saw winds diminishing and temperatures climbing throughout the day. In the morning hours the rain snow line hovered around 600′ but by mid-afternoon that had climbed to roughly 1800′ with light rain/ snow under grey-bird skies.
Today looks to be much of the same as we are under the influence of warm, moist southerly flow with light rain/ snow continuing at least thru the morning and tapering off this afternoon. Rain/ snow line looks to be around 1,000′ where we may see an inch of snow accumulation throughout the day. Ridge top winds are expected to be from the East in the 10-15mph range with temperatures in the high 20’s at 3,000′ and low to mid 30’s at 1,000′
Heading into the weekend, a series of weak lows will continue to move through our area promoting a similar rain/ snow mix in south central AK. Late in the weekend (Sunday) and into next week temperatures appear to cool off enough to support all snow.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||33||1||.2||41|
|Summit Lake (1400′)||33||0||.02||7|
|Alyeska Mid (1700′)||33||1||.1||25.5|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||27||n/a||17||35|
|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: 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.