|Signal Word||Size (D scale)||Simple Descriptor|
|Small||1||Unlikely to bury a person|
|Large||2||Can bury a person|
|Very Large||3||Can destroy a house|
|Historic||4 & 5||Can destroy part or all of a village|
As we move farther and farther away from the New Year’s storm and the wind events of last week, the likelihood of triggering an avalanche is decreasing. The last human triggered avalanche was Friday evening(1.10.20) on the Crow Pass trail. However, our current persistent slab issue still warrants caution in the Alpine. Weak snow buried in the snowpack has the potential to be triggered especially where there is a hard slab sitting on top of weak facets “sugar snow”. Overall signs are pointing to improving stability but as your choose where to travel keep the lingering possibility of triggering an avalanche in mind. Pay attention to potential consequences. If the slope were to slide with you on it, where would the debris pile up? Watch for areas with very hard snow over soft snow and use safe travel protocols. Regions on the periphery of our forecast zone like Crow Pass or just outside the forecast zone like Summit Lake saw more wind effect last week and extra caution is advised.
Loose snow avalanches (sluffs): On slopes out of the wind expect sluffing in steep terrain. The surface snow is becoming looser and looser by the day with the cold temperatures.
Cornices: Give cornices plenty of space and limit your exposure when passing beneath them.
Glide avalanches: Due to the unpredictable potential to release, limit your time spent under glide cracks.
Yesterday: Skies were mostly clear. Winds were light and variable and temperatures were inverted. Upper elevations were in the single digits and valley bottoms were a few degrees below 0°. Overnight the inversion remained in place and winds were calm.
Today: Clear skies continue to day with temperatures in the valleys ranging from just below 0° to the low single digits and upper elevations reaching highs in the teens. Winds are forecast to be mostly calm. Temperatures dip down again tonight and winds will be light and easterly.
Tomorrow: Another day of clear and cold with inverted temperatures and light east winds. Saturday a few clouds move in and build overnight into Sunday. Temperatures are forecast to rise into the 20°Fs and there looks to be the potential for some snow in the forecast.
PRECIPITATION 24-hour data (6am – 6am)
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||3||0||0||37|
|Summit Lake (1400′)||-6||0||0||15|
|Alyeska Mid (1700′)||3||0||0||36|
RIDGETOP 24-hour data (6am – 6am)
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||6||variable||2||11|
|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: 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.