| Trigger | Natural | Remote Trigger | 0 |
| Avalanche Type | Hard Slab | Aspect | Unknown |
| Elevation | unknown | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | unknown |
Avalanche: Summit
Location: Road Observations - Butch and Fresno
A quick drive through Summit Lake revealed two new natural avalanches sometime on April 1st or 2nd.
The first avalanche was a storm slab on Fresno (Easterly facing at ~3,000′). This looks to have stepped down into old weak layers (possibly depth hoar which is prevalent in the area). Propagation was not significant with this slide.
The second slab avalanche was on Butch Mtn (Westerly facing at ~4,000′). Roughly a 2′ crown with significant propagation. This slide looks to have been triggered by a cornice fall then sympathetically triggered a slab on a lower sub-ridge (looker’s right). Look closely at photos below.
Avalanche Details
Details above.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
Recent avalanches continue despite quieter weather.
Natural storm slab on Butch Mtn: West facing, 4,000' - released sometime April 1 or 2, 2017. Significant propagation.
Natural shallow slab under cornice that triggered a step down into deeper layers in two places below - possibly depth hoar which is prevalent. Minor propagation.
Natural wet loose (possibly some small shallow wet slab) avalanche along Moose Mtn, !,500' Westerly facing.