Last weekend we got a rash of reports of skier triggered avalanches. There was a good size avalanche in Surprise Bowl in Girdwood with people partially buried, a remotely triggered slab on Silvertip, and small slabs kicked loose in Turnagain Pass. Through the work week we haven’t had any more reports of similar avalanche activity, but we expect some areas may still behave this way.
With fantastic spring weather and strong temperature swings between day and night the snow at the surface is getting faceted and weaker. This process breaks up the slab character and makes it more difficult for stiffer snow to connect together in larger plates. We think the slabs that people found a week ago will be more difficult to find this weekend because of that faceting or degrading of the stiffer pockets.
Skiers and snowmachiners are putting tracks all over the place right now, including steep terrain. It’s a good time to explore some of the farther reaches of Alaska, but keep in mind that anomalies may be found.
We saw some really large overhanging cornices yesterday, including one that had recently fallen. This concern increases late in the day as temperatures rise and the cornice structure loses strength. Avoid spending time below overhanging cornices and watch your exposure at the ridgetops.
The wet avalanche meltdown still has not begun. Direct south facing slopes, especially at lower elevations should be suspect late in the day. As the daytime temperatures heat up the snow there is a corresponding loss of strength and wet avalanches may be initiated. Temperatures last night did not get as low as they have been, so there may be a slight increase in activity this afternoon.
One more day of sunshine before a pattern change... Tomorrow we have clouds and a chance of precipitation in the forecast.
Nothing major is notable in the weather of the last 24 hours through today. Overnight temperatures were a little warmer last night - in the low 20s. This could make it easier for afternoon warming to produce wet avalanche activity.
Wind is light from the southeast. Afternoon temperatures should reach into the low 40s again today.
Wendy will issue the next advisory tomorrow morning, April 21st.
|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.