Northern Gallatin

Watch out for the Wind Drift

Date
Activity
Skiing

There was 9” of new snow at higher elevations compared to 4” at the parking lot, and what was accurately reported at Shower Falls SNOTEL. We saw strong winds blowing huge plumes of snow off Maid of the Mist proper. Spindrift and wind-loading into gullies, near ridgelines and other slopes exposed to the wind was our primary concern. We dug two snowpits, one in the Basin low on a north facing slope and another on the south-facing shoulder. We got ECTNs in both. We found the 2-3" thick layer of facets and surface hoar on the south-facing pit buried 3' deep. They propagated failure with a few extra hits in our ECT. They weren't sensitive where we dug today, but I would not forget about them. 

We avoided wind-loaded slopes entirely and would recommend digging down three to four feet to test the upper level of the snowpack before considering any steep slopes. 

Region
Northern Gallatin
Location (from list)
Maid of the Mist
Observer Name
Dave Zinn

Avalanche on Hyalite Peak

Hyalite Peak
Northern Gallatin
Code
HS-ASu-R2-D2-O
Elevation
10000
Aspect
N
Latitude
45.38100
Longitude
-110.96100
Notes

Me and a buddy were out skiing/camping in the Hyalite Lake area. Late Saturday afternoon we started skinning up towards Hyalite Peak. The path up to the ridge was super hardpacked and windswept. We got up and there was quite a bit of snow loaded above the north slope. I dropped over the side and took about two turns before the entire face above me released from the very top and traveled down the entire north side down to the bowl below. I was able to get to the rocks on the side and my partner was able to pick his way down. The crown looked a few feet deep from what I could see and stretched across the entire top of the line.

Number of slides
1
Number caught
1
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
2
D size
2
Bed Surface
O - Old snow
Slab Thickness
24.0 inches
Vertical Fall
500ft
Slab Width
75.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Me and a buddy were out skiing/camping in the Hyalite Lake area. Late Saturday afternoon we started skinning up towards Hyalite Peak. The path up to the ridge was super hardpacked and windswept. We got up and there was quite a bit of snow loaded above the north slope. I dropped over the side and took about two turns before the entire face above me released from the very top and traveled down the entire north side down to the bowl below. I was able to get to the rocks on the side and my partner was able to pick his way down.

Avalanche Details: Avalanche on Hyalite Peak
Northern Gallatin, 2023-02-07

Me and a buddy were out skiing/camping in the Hyalite Lake area. Late Saturday afternoon we started skinning up towards Hyalite Peak. The path up to the ridge was super hardpacked and windswept. We got up and there was quite a bit of snow loaded above the north slope. I dropped over the side and took about two turns before the entire face above me released from the very top and traveled down the entire north side down to the bowl below. I was able to get to the rocks on the side and my partner was able to pick his way down.

Avalanche Details: Avalanche on Hyalite Peak
Northern Gallatin, 2023-02-07

Me and a buddy were out skiing/camping in the Hyalite Lake area. Late Saturday afternoon we started skinning up towards Hyalite Peak. The path up to the ridge was super hardpacked and windswept. We got up and there was quite a bit of snow loaded above the north slope. I dropped over the side and took about two turns before the entire face above me released from the very top and traveled down the entire north side down to the bowl below. I was able to get to the rocks on the side and my partner was able to pick his way down.

Northern Gallatin, 2023-02-07

Avalanche on Hyalite Peak

Date
Activity
Skiing

Me and a buddy were out skiing/camping in the Hyalite Lake area. Late Saturday afternoon we started skinning up towards Hyalite Peak. The path up to the ridge was super hardpacked and windswept. We got up and there was quite a bit of snow loaded above the north slope. I dropped over the side and took about two turns before the entire face above me released from the very top and traveled down the entire north side down to the bowl below. I was able to get to the rocks on the side and my partner was able to pick his way down. The crown looked a few feet deep from what I could see and stretched across the entire top of the line.

Region
Northern Gallatin
Location (from list)
Hyalite Peak
Observer Name
Caitlin Fueg

Reactive wind slabs in Hyalite

Date
Activity
Ice Climbing

Heading up the Genesis gully towards Zack Attack on 2/5, we turned around after finding multiple very reactive slabs. The first slab broke very easily, ~4 hits from the wrist, and had a very clean shear ~4in deep. The second slab was more difficult to trigger and did not have a clean shear, but was maybe ~1.5-2ft deep.

Region
Northern Gallatin
Location (from list)
Hyalite - main fork