|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|
Clear skies overnight and temperatures in the 20’sF this morning have likely produced a solid re-freeze of any snow that warmed up yesterday afternoon. This is good news for those wishing to harvest some corn on this sunny Saturday, which also happens to be the first day of May! The main thing to watch for is how the surface is warming through the day. Light east winds and direct sunshine should start melting surface crusts fairly quickly, even without exceedingly warm ambient air temperatures. Here are some things to keep in mind:
Cornices: What about cornices? These have not been falling off as readily as we’ve seen in past years. Nonetheless, they are feeling the heat and can’t be trusted. Steering well clear of them from above and limiting exposure under them will be prudent as the spring progresses.
Punchy wet snow our easy clue to look for – telling us the snow has lost strength and if the slope is steep enough, wet avalanches can occur. 4.30.21.
There is still PLENTY of snow out there. This photo is from yesterday, looking west from Taylor Pass with Sunburst on the right and Seattle Ridge in the back. 4.30.21.
Watch for glide cracks and limit time, or avoid if possible, being under them. Glide cracks can release into a destructive avalanche at anytime. They are completely unpredictable and don’t follow any perfect patten. Although it has been several days since we’ve heard of any cracks releasing, there have not been many people out to see them if they have.
Seattle Ridge often sees many glide cracks in the spring. Some of these release and avalanche and some end up just melting out in place. It’s impossible to determine what crack will do what so avoiding time under them is always a good idea. 4.30.21.
Yesterday: After a cloudy morning, skies cleared up around noon with light northwest ridgetop winds (5-10mph). Temperatures peaked in the high 40’sF and ~30F around 5pm in valley bottoms and ridgetops respectively, before dropping to the 20’s overnight at all elevations.
Today: Clear skies remained overnight and sunshine is expected to last through today. Ridgetop winds are forecast to be light from the east ~5mph. Temperatures should climb back into the the warm springtime realm of the 50’sF in valley bottoms and up to 40F along ridgelines.
Tomorrow: Cloudy skies, moderate to strong east winds and a chance for a little precipitation are all expected to move in Sunday as a low pressure in the Gulf pushes a front our way. Models are showing at most a trace-.1″ of light rain below ~2,000′ with up to an inch of light snow showers above this. Ridgetop winds are forecast to blow in the 25-30mph from the east through the day before quieting down Monday. Models are hinting at another, more powerful system moving in Tuesday. This one could add 4-6″ of snow above ~2,000′ by Wednesday.
PRECIPITATION 24-hour data (6am – 6am)
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||35||0||0||87|
|Summit Lake (1400′)||33||0||0||25|
|Alyeska Mid (1700′)||35||0||0||96|
RIDGETOP 24-hour data (6am – 6am)
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||31||NW||7||12|
|05/18/21||Turnagain||Observation: Tincan Ridge||Joe Kurtak|
|04/30/21||Turnagain||Observation: Sunburst||W Wagner Forecaster|
|04/27/21||Turnagain||Observation: Tincan Ridge||Joe Kurtak|
|04/26/21||Turnagain||Observation: Magnum||Creighton/ Hoople|
|04/25/21||Turnagain||Observation: Sunburst||Nick D'Alessio|
|04/24/21||Turnagain||Observation: Airplane obs||Johnston-Bloom / DiJulia /Hilliard Forecaster|
|04/24/21||Turnagain||Observation: Corn biscuit||Heather Johnson|
|04/23/21||Turnagain||Avalanche: Lynx Ck Drainage||W Wagner Forecaster|
|04/23/21||Turnagain||Avalanche: Sunburst||Eeva Latosuo|
|04/23/21||Turnagain||Observation: Center Ridge Turnagain pass||Joe Kurtak|
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.