Northern Gallatin

Big Slide on Eaglehead Mountain right below the radio tower

Date
Activity
Snowbiking

Big slide below the radio tower. Kept our distance but looks like a large crown. The base up Portal is really inconsistent. Some spots it’s great and others you sink up to your chest. Had 4 instances of whompfing on fairly flat ground in the trees.  1st picture is from today and 2nd is from Sunday

Thanks for all your hard work!

Region
Northern Gallatin
Location (from list)
Portal Creek
Observer Name
Glenn Edwards

Natural Activity on Mt. Blackmore

Mt Blackmore
Northern Gallatin
Code
L-N
Aspect
E
Latitude
45.44440
Longitude
-111.00400
Notes

From obs on 03/03/2024: "White touring in the History Rock area, I spotted a couple of recent slides on the NW shoulder of Mt. Blackmore. From a distance, these look like dry-loose slides on the recent snow interface around 8,500ft. on a N-NE aspect."

 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Natural trigger
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Continued Signs of Instability

Date
Activity
Skiing
Snowboarding

Continued signs of instability on a tour in Maid of the Mist Basin. A couple large collapses down low in the trees, wind slabs above tree line on variable aspects due to swirling wind up high. Large avalanche crown (10’ - 12’ in places) at the back of the basin which looked to have been trigger from cornice fall 3-4 days ago. ECTP 28 55cm off of ground on a 5cm thick layer of facets. Pit was dug on an east facing slope at 9,100 feet. 

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

Natural Activity NW of Blackmore

Date
Activity
Skiing

White touring in the History Rock area, I spotted a couple of recent slides on the NW shoulder of Mt. Blackmore. From a distance, these look like dry-loose slides on the recent snow interface around 8,500ft. on a N-NE aspect.

Otherwise, 12-20cm of new snow was present in the area (~ HS 80-115cm), with evidence of wind loading on east aspects, and scouring on west aspects. No other signs of instability were observed.

Region
Northern Gallatin
Location (from list)
History Rock

Natural Avalanches on Arden peak

Maid of the Mist
Northern Gallatin
Code
HS-N-R4-D3-O
Elevation
9900
Aspect
E
Latitude
45.41140
Longitude
-110.98800
Notes

Skiers on 03/03/2024 saw several natural avalanches that happened near Maid of the Mist on Arden Peak. These avalanches likely happened between 03/01/2024 and the morning of 03/03/2024

 

From obs on 03/04/2024: "Continued signs of instability on a tour in Maid of the Mist Basin. A couple large collapses down low in the trees, wind slabs above tree line on variable aspects due to swirling wind up high. Large avalanche crown (10’ - 12’ in places) at the back of the basin which looked to have been trigger from cornice fall 3-4 days ago. ECTP 28 55cm off of ground on a 5cm thick layer of facets. Pit was dug on an east facing slope at 9,100 feet."

Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
4
D size
3
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
120.0 inches
Vertical Fall
700ft
Slab Width
1420.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

From obs: "Shot from the top of Flanders, ~1400 this afternoon, 3/3/2024. Big slide(s) on Arden and in Maid of the Mist. Looks like the skin track and ski track between the two slides got taken out. At first glance from across the way it looked like the skin track was crossing over the debris, but when zoomed in it looks like the debris overran the skin track and the ski track." Photo: M. Zia

Northern Gallatin, 2024-03-03

From obs: "Shot from the top of Flanders, ~1400 this afternoon, 3/3/2024. Big slide(s) on Arden and in Maid of the Mist. Looks like the skin track and ski track between the two slides got taken out. At first glance from across the way it looked like the skin track was crossing over the debris, but when zoomed in it looks like the debris overran the skin track and the ski track." Photo: M. Zia

 

Northern Gallatin, 2024-03-03

Arden Peak slide

Date
Activity
Skiing

Shot from the top of Flanders, ~1400 this afternoon, 3/3/2024. Big slide(s) on Arden and in Maid of the Mist.

 

Looks like the skin track and ski track between the two slides got taken out. At first glance from across the way it looked like the skin track was crossing over the debris, but when zoomed in it looks like the debris overran the skin track and the ski track.

Region
Northern Gallatin
Location (from list)
Maid of the Mist
Observer Name
Matt Zia