Once again, the main concern boils down to how our snowpack is adjusting to last week’s 3-5′ of heavy storm snow. The good news is, all signs for the past couple days have pointed to the new snow/old snow interface (3-5′ slab over weak preexisting snow) gaining strength. Though this is great news, it’s not something to completely hang a hat on, yet. It was only 3 days ago now that we had good enough visibility for folks to test the slopes and come away with a handful of human triggered large – and dangerous – avalanches. Also, we are still only 4 days out from the end of the storm itself. A bit more time to really let the snowpack prove innocent is warranted.
Though the likelihood of triggering a deep slab continues to decrease, the size of a potential slide remains large. Due to the high consequences, conservative terrain choices remain the best way to manage the problem. This means avoiding steep slopes, especially those with prior wind loading, and likely trigger points. Likely trigger points include shallow spots in the snowpack and steep rollovers. For those with a higher risk tolerance, safe travel practices are key in avalanche terrain – this includes only exposing one person at time and keeping a close eye on your partners.
*Areas that have a higher likelihood are places that did not receive as much snowfall from last week’s storm and have a shallower overall snowpack. For example the central Kenai – Palmer Creek area, Silvertip region and Summit Lake zones.
By the look of the satellite imagery this morning, the sun may shine more than expected today. Also, the winds are slated to be calm to very light. These factors combined can create significant warming at the snow surface. If this is the case today, watch for damp to wet loose avalanches on southerly aspects. These would likely just entrain the light 3-5″ of snow from Sunday.
It was one of those overcast and low visibility days yesterday. Light snow showers were off and on but only added a trace of snow. Temperatures during the past 24-hours have averaged in the upper teens on the ridge tops and winds have been light, 5-10mph, from the East.
Today, we may see a few snowflakes before skies begin to clear. Temperatures are expected to climb to the low 30’sF at 1,000′ and around 20F on the ridgelines. Winds look to shift to the NW this morning and remain light, around 5mph, before picking up to the 20mph range late tonight.
Mostly clear skies and mild temperatures are on tap for Wednesday and Thursday as high pressure builds over mainland Alaska. This high looks to persist into the weekend.
|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.