| Trigger | Natural | Remote Trigger | Unknown |
| Avalanche Type | Hard Slab | Aspect | Southeast |
| Elevation | 3600ft | Slope Angle | 38deg |
| Crown Depth | 12in | Width | 250ft |
| Vertical Run | 400ft |
Avalanche: Chugach State Park
Location: Arctic Valley, Mt. Gordon Lyon
Observed avalanched debris on the SE aspect of Mt. Gordon Lyon from the S. fork Eagle River saddle.
Avalanche Details
Observed avalanche debris on SE aspect of Mt. Gordon Lyon at approx. 1500 hrs on 3/27/21. 61.2581, 149.50493. Approx. 250ft wide with debris running 0.2mi down slope. Appeared to be natural release within the last 24hrs. Probably due to loading of steep slopes on E. aspect of Gordon Lyon slope by W. winds. Arctic Valley weather station reported gusts to 25mph in the past 24hrs. Was not able to access debris so crown height and physical dimensions are only estimates (pic)
HS?-NS-R3-D2
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
Recent avalanche on E. aspects
Weather
Partly sunny with W. wind estimated 10-15 with G20? Was 10deg at 1500.
Snow surface
Wind transporting snow onto E. aspects during time of observation.
Snowpack
One inch thick sun crust forming on S. facing slopes. Loose snow on other aspects (pic).
Avalanche debris on SE aspect of Mt. Gordon Lyon, Arctic Valley
Sun Crust on S. aspect of Mt. Gordon Lyon.