"Slide occurred north northwest aspect of Mt Blackmore at 9400ft in a narrow meadow. This provides width of slide." Photo: Laura Ippolito
Avalanche Details: Many natural avalanches on Mt Blackmore
Northern Gallatin, 2020-02-16
19-20
"Slide occurred north northwest aspect of Mt Blackmore at 9400ft in a narrow meadow. Close-up view of an approximate 8" crown." Photo" L. Ippolito
Avalanche Details: Many natural avalanches on Mt Blackmore
Northern Gallatin, 2020-02-16
Photo of the Divide Basin avalanche that was likely triggered by a cornice fall on Friday, Feb 14. Photo: Nick Truax
Avalanche Details: Large natural avalanche in Divide Basin, Hyalite
Northern Gallatin, 2020-02-16
Photo of the Divide Basin avalanche that was likely triggered by a cornice fall on Friday, Feb 14. Photo: Nick Truax
Avalanche Details: Large natural avalanche in Divide Basin, Hyalite
Northern Gallatin, 2020-02-16
Natural avalanche on Chestnut Mountain, N. Gallatins
Chestnut Mountain
Northern Gallatin
Code
SS-N-R4-D2-O
Elevation
7000
Aspect
E
Latitude
45.60570
Longitude
-110.88100
Notes
From an observation, "R3-4 D2 avalanche that failed at the ground observed from the Trail Creek Rd. Looked to be several hundred feet wide, couldn’t see the debris, but crown went through lots of trees."
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
4
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
From an observation, "R3-4 D2 avalanche that failed at the ground observed from the Trail Creek Rd. Looked to be several hundred feet wide, couldn’t see the debris, but crown went through lots of trees." Photo: Chris Cullaz
Avalanche Details: Natural avalanche on Chestnut Mountain, N. Gallatins
Northern Gallatin, 2020-02-16
From an observation, "R3-4 D2 avalanche that failed at the ground observed from the Trail Creek Rd. Looked to be several hundred feet wide, couldn’t see the debris, but crown went through lots of trees." Photo: Chris Cullaz
Avalanche Details: Natural avalanche on Chestnut Mountain, N. Gallatins
Forecast link: GNFAC Avalanche Forecast for Mon Feb 17, 2020
Northern Gallatin, 2020-02-16
Forecast link: GNFAC Avalanche Forecast for Mon Feb 17, 2020
Two large slides on Wheeler Mtn
Wheeler Mountain
Northern Gallatin
Code
N-R4-D3.5-O
Elevation
7900
Aspect
S
Aspect Range
S-E
Latitude
45.50900
Longitude
-111.06700
Notes
We skied Wheeler via South Cottonwood and found that the two gullies on the East and South East aspects had recently run in their entirety. We could only see the crown on the South East gully but it appeared to have broke on the steepest part of the slope near the top approximate 3-4ft deep and was the width of the gully. Both avalanches ran the full length and width of their gullies, breaking several trees along the way. The East debris pile was about 25ft deep and the South East was 15ft deep. The East rounded the corner into the ravine at the bottom and also ran about 200ft into the forest. A couple larger trees in the path that were not broken had their branches stripped off the bottom 30ft. Interestingly, the narrow meadow between the South East gully and the South East meadow you recently reported slides on has not slid. Also, we had no propagation or collapsing in our pits.
Number caught
0
Number buried
0
Trigger
Natural trigger
R size
4
D size
3.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
36.0 inches
Images
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
We skied Wheeler via South Cottonwood and found that the two gullies on the East and South East aspects had recently run in their entirety. We could only see the crown on the South East gully but it appeared to have broke on the steepest part of the slope near the top approximate 3-4ft deep and was the width of the gully. Both avalanches ran the full length and width of their gullies, breaking several trees along the way. The East debris pile was about 25ft deep and the South East was 15ft deep.
Avalanche Details: Two large slides on Wheeler Mtn
Forecast link: GNFAC Avalanche Forecast for Mon Feb 24, 2020
Northern Gallatin, 2020-02-16
Forecast link: GNFAC Avalanche Forecast for Mon Feb 24, 2020
We skied Wheeler via South Cottonwood and found that the two gullies on the East and South East aspects had recently run in their entirety. We could only see the crown on the South East gully but it appeared to have broke on the steepest part of the slope near the top approximate 3-4ft deep and was the width of the gully. Both avalanches ran the full length and width of their gullies, breaking several trees along the way. The East debris pile was about 25ft deep and the South East was 15ft deep.
Avalanche Details: Two large slides on Wheeler Mtn
Northern Gallatin, 2020-02-16