| Trigger | Skier | Remote Trigger | Unknown |
| Avalanche Type | Dry Loose Snow | Aspect | South |
| Elevation | 4400ft | Slope Angle | 37deg |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | 600ft |
Avalanche: Hatcher Pass
Location: Marmot
IMB>Rae Wallace
25F, calm, overcast skies @ 13:00 @ 3500′
22F light east winds, overcast > broken skies @ 14:30 @ 4500′
Avalanche Details
Dry loose avalanches 12/1/2019, after 6" of new snow overnight (3000-4500'):
Some natural, small (D1), dry loose avalanches on steep slopes (35deg +), Rae Wallace, South face Skyscraper, likely in many other areas but visibility limited our observations.
Human triggered, small (up to D1.5), dry loose avalanches on steep slopes (35 deg +). Numerous on Microdots south face and Microdot's Swimming Tim's.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
No avalanches other than small up to D1.5 dry loose.
Some new glide cracks forming and expanding. See picture of Marmot.
No cracking, No collapsing, No slab avalanches observed today.
Old Thanksgiving wind slab has bonded well and is now buried 6" deep @ 3-4.5k'.
Weather
6" new 3-4.5k'
25F, calm, overcast skies @ 13:00 @ 3500'
22F light east winds, overcast > broken skies @ 14:30 @ 4500'
Snow surface
6" new snow overnight, low density, not a significant load
Light winds were not moving snow at ridgeline at 14:30 @ 4500'
Mid elevation has some previously wind protected zones where ski penetration is up to 2 feet deep.
Above 4000', the old Thanksgiving wind slab appears to be widespread, supportable, and limits ski penetration to 6" in many locations.
Steep slopes with previous dry loose debris are begining to firm up.
Snowpack
No snowpits today.
Hasty tests confirmed Thanksgiving wind slab well bonded to older snow, good stability.
***Glide cracks continue to form and expand. Marmot mountain has new glide cracks we observed 2 days ago, these have expanded as of today. The Mid Rib on Marmot is not a good up-track right now as the glide hazard is high consequence and we would not be surprised if this glide released very soon.
Cornices have grown significantly in size, due to the Thanksgiving new snow and strong winds.
12/1/2019 Dry loose on Microdot, S, 4400'
12/1/2019 Marmot glide cracks expanding, SW, 4000'
12/1/2019 Glide cracks on Rae Wallace Chutes and Ladders, NE, 4350'