The snowpack continues to fall apart at the ground. Yesterday, another large glide crack released on the face of Seattle Ridge. If you are headed to Turnagain Pass this weekend you can’t miss it, it’s front and center, just across from the motorized parking lot. If you have not been to the ‘Pass’ for a while, you may be surprised at how many cracks litter the mid-elevations and how many of these have released. It goes without saying, staying out from under glide cracks is HIGHLY recommended!
*With the unseasonably warm temperatures over the past week, the springtime melt-down (or shed-cycle) is closing in upon us. We do have cooler temperatures for today, and likely tonight, that will form surface crusts as high as 2,500′, but it is good to remember that undreneath the pack is very wet and unsupportable at these mid-elevations. This ‘rotten’ soft snow, so to speak, is a red flag for not only the glide problem but for the potential for large wet slab and wet loose avalanches.
Wet Loose Slides today? Southerly slopes seing direct sunlight may warm enough to melt the surface crust. In this case, wet loose slides could be triggered by people. Keep tabs on the surface conditions.
At elevations above 3,000′ (above the majority of the glide crack/avalanche hazard) fairly dry snow exists. There was roughly 2-5″ of new snow yesterday which sits on a mixture of old loose snow and old sun and wind crusts. Shallow wind slabs composed of mostly the new snow likely formed on leeward slopes during yesterday’s moderate Easterly winds. These slabs should be ~6-8″ thick and in pockets along ridgelines. Quick hand pits and watching the surface texture for smooth rounded wind pillows and drifts will help to find any relatively new wind slabs.
With a chance for direct sunshine today (and tomorrow) watch for cornices to weaken and possibly fall naturally. We have not seen much cornice failure recently but we do know these large features will begin to start calving soon. Limiting and avoiding time under cornices will be key as we head into springtime hazards.
If skies clear for travel above treeline, take stock of the slope or couloir you wish to ride/ski – is there a large cornice looming over you while you ascend/descend?
Yesterday’s weather consisted of overcast skies with some light precipitation in the morning hours. Around .5″ of rain fell up to 2,000′ and between 2-5″ of snow fell above 2,000′. Ridgetop winds were moderate, averaging to 20mph with gusts to 40mph from a generally East direction. Temperatures were in the mid-30’s at 1,000′ and upper 20’s at 3,000′. Overnight, winds have died down substantially and temperatures have cooled off several degrees and move into a break between storms.
For today, we are expecting partly cloudy skies, which could become quite clear by noon before a chance more clouds might move in later today (tough sky cover forecast). No precipitation is expected and winds are slated to be light to moderate from a Northerly direction, averaging 5-15mph. Temperatures should begin to climb again today as the sun comes out and reach up to 40F at 1,000′.
Sunday looks to be nice: mostly clear skies and light Northerly winds as a quick high pressure ridge builds before another low pressure system moves in Sunday night.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||32||rain||0.5||124|
|Summit Lake (1400′)||35||rain||0.3||41|
|Alyeska Mid (1700′)||33||rain||0.3||105|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||27||SE||12||23|
|04/21/21||Turnagain||Observation: Sunburst||Schauer/ Behney Forecaster|
|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|
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.