Northern Gallatin

New snow avalanches at Portal Crk

Portal Creek
Northern Gallatin
Code
SS-N-R2-D2-S
Latitude
45.28900
Longitude
-111.14100
Notes

Saw a couple small natural slides breaking in the new snow. The one on the small slope beside the road actually appeared to have broken when a snow bike crossed the top just off the side of the road. The other was natural and occurred in the afternoon sometime 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
S - Avalanche released within new snow
Problem Type
New Snow
Slab Thickness
8.0 inches
Vertical Fall
350ft
Slab Width
200.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

From obs 3/26/23: "Saw a couple small natural slides breaking in the new snow.... occurred in the afternoon sometime" Photo: J. Weingarten

Northern Gallatin, 2023-03-27

Surface snow breaking at Portal today

Date
Activity
Snowmobiling

Saw a couple small natural slides breaking in the new snow. The one on the small slope beside the road actually appeared to have broken when a snow bike crossed the top just off the side of the road. The other was natural and occurred in the afternoon sometime 

Region
Northern Gallatin
Location (from list)
Portal Creek
Observer Name
Jed Weingarten

Small skier triggered slide near Little Ellis, partial buried

Mt Ellis
Northern Gallatin
Code
SS-AS-R3-D2-I
Elevation
7500
Aspect
E
Latitude
45.59710
Longitude
-110.96100
Notes

Came across debris of a recent skier-triggered slide near the top of Little Ellis in a small, protected, eastern facing gully around 7,500'. Crown was ~3.5-1.5' deep, ~35' wide and it ran ~150'. Ski tracks were observed near the top of the crown and next to a small hole near the surface ~70' from the crown where it looks like someone self extracted. No signal was found with a beacon search and my group felt that the one track from the hole must have been from the same skier as the track near the crown. 

There was around 2-3' of heavy new snow at that location.

Number of slides
1
Number caught
1
Number buried
1
Avalanche Type
Soft slab avalanche
Trigger
Skier
R size
3
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
30.0 inches
Vertical Fall
150ft
Slab Width
35.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

[On 3/25/23]: Skier reported, "Came across debris of a recent skier-triggered slide near the top of Little Ellis in a small, protected, eastern facing gully around 7,500'. Crown was ~3.5-1.5' deep, ~35' wide and it ran ~150'. Ski tracks were observed near the top of the crown and next to a small hole near the surface ~70' from the crown where it looks like someone self extracted. No signal was found with a beacon search and my group felt that the one track from the hole must have been from the same skier as the track near the crown." Photo: R. Beck

Northern Gallatin, 2023-03-26

[On 3/25/23]: Skier reported, "Came across debris of a recent skier-triggered slide near the top of Little Ellis in a small, protected, eastern facing gully around 7,500'. Crown was ~3.5-1.5' deep, ~35' wide and it ran ~150'. Ski tracks were observed near the top of the crown and next to a small hole near the surface ~70' from the crown where it looks like someone self extracted. No signal was found with a beacon search and my group felt that the one track from the hole must have been from the same skier as the track near the crown." Photo: R. Beck

Northern Gallatin, 2023-03-26

Small slide near Little Ellis

Date
Activity
Skiing

Came across debris of a recent skier-triggered slide near the top of Little Ellis in a small, protected, eastern facing gully around 7,500'. Crown was ~3.5-1.5' deep, ~35' wide and it ran ~150'. Ski tracks were observed near the top of the crown and next to a small hole near the surface ~70' from the crown where it looks like someone self extracted. No signal was found with a beacon search and my group felt that the one track from the hole must have been from the same skier as the track near the crown. 

There was around 2-3' of heavy new snow at that location.

Region
Northern Gallatin
Location (from list)
Mt Ellis
Observer Name
Reid Beck

Lots of New Snow in Hyalite (lot more than Snotel)

Date
Activity
Skiing

Toured into Moser Creek on 3/25 to find some pow turns. Measured 85cm ~34” of new snow and saw many shooting cracks on a density change in the new snow but surprisingly no propagating pit test results. It seemed that the snow was so new and so low density that it wasn’t making a cohesive slab. There was a stark new to old snow interface.

Region
Northern Gallatin
Location (from list)
Lick Creek
Observer Name
Harrison Bigos-Lowe