| Trigger | Skier | Remote Trigger | Unknown |
| Avalanche Type | Dry Loose Snow | Aspect | Southwest |
| Elevation | 4600ft | Slope Angle | 40deg |
| Crown Depth | unknown | Width | 40ft |
| Vertical Run | 200ft |
Avalanche: Hatcher Pass
Location: Hatcher Pass, Southwest aspect MicroDot Peak
Skinned up from Independence Mine Parking Lot into head of Rae-Wallace Bowl then up south ramp to Picnic Bench at 4200′ on MicroDot west ridge. This observation is after first snow storm of season. Wet grabby snow surface below 3500′. Dryer powder above. Primary danger is sloughs on higher slope angles.
Avalanche Details
Skier descended from near MicroDot summit along rock ribs on SW face. He initiated a large slough and at one point was skiing below it followed by a dog. They cleared the slough by skiing at a cross angle. Slough was large enough to knock skier down and bury dog.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
Large slough avalanche came down the Martin Mine gully on south side of Skyscraper at some point during the storm. Overall, point releases off dark rocks facing west
Weather
Clear and sunny, light winds. See attached snow profile image.
Snow surface
Wet grabby snow surface below 3500'. Dryer powder above.
Snowpack
See attached snow profile image.
Snow Pilot pit profile.
Large avalanche slough down Martin Mine Gully.
Large skier initiated slough - SW Face MicroDot Peak