CNFAIC LogoCNFAIC Logo

Observations

Region: Turnagain
Location: Twin Peaks
Observer:
Date:

Avalanche Details

Avalanche details

Trigger SkierAvalanche Type Soft SlabAspect East
Elevation 3200ftSlope Angle 37degCrown Depth 12in
Width 1000ftLength 2000ft  

Observer Comments

I was in a party of three which followed a party of five up the east slope of Twin Peaks to the south ridge. The party of five skied/snowboarded a run successfully at about the time we reached the ridge. We continued on to the south peak. We noticed that two of the party had started to re-climb. At the summit, before starting our descent we noticed a large fan of debris starting from the skin track. This changed our original plan of skiing the middle rib, opting to traverse over to where the previous party had skied and skied down a bit north of their tracks. Viewing from the peak, we thought it was a large shallow slab that lost energy and stopped. Upon descending, we found that the crown ,while only the 12 inches or so of recent snow, extended well to the south, at least 400 yards or so, and the debris continued all the way to the valley floor. After skiing some powder and quite a bit of soft debris, we made it to the bottom where one of the previous party had waited to be sure that we were all ok. We met them again at the parking lot, where they explained that after the initial run, three of the party headed out while two climbed for a second run. At around 3200 ft, while climbing, the fracture released. One of the two was caught but managed to dig into the bed surface and stop sliding fairly quickly. Of interest was the thousand pound chunk of ice that the slide had knocked loose from a small icefall near the bottom of the climb - it rolled quite a ways... sorry I didn't take a picture. So in hindsight, as soon as you turn the corner at Johnson pass you are in conditions much more similar to Summit than Turnagain. We felt pretty good about the snowpack while climbing... obviously our "feelings" were misplaced. Fun times.

Red Flags

Observer Comments

Obvious melt freeze crust under last weeks snow at all elevations

Weather

Weather

Clear, light breeze. Below zero at the highway, teens up on the mountain

Snow Characteristics

Snow surface

12" settled snow from previous snowfall over melt-freeze crust

Snowpack

No pit

Photos & Video

Photos



USFS SNOW AND AVALANCHE HOTLINE (907) 754-2369
If you have comments or questions regarding CNFAIC operations or winter recreation management, please email staff@chugachavalanche.org
© 2018 Chugach National Forest Avalanche Information Center. All rights reserved.
FCNFAIC
Donate
If you think a public avalanche
center is important then we urge
you to become a member & donate.


PickClickGive