18-19
Skier triggered in Frazier Basin
Frazier Basin
Bridger Range
Code
SS-ASr-R2-D1.5-I
Aspect
NE
Latitude
45.92270
Longitude
-110.97500
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
2
D size
1.5
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Skier/cornice triggered south summit of Saddle Peak
Saddle Peak
Bridger Range
Code
SS-NC-R1-D2
Latitude
45.79350
Longitude
-110.93600
Notes
Forecaster note: From road on drive down at 1400. Used binoculars to confirm. Saw skier/cornice triggered slide off south summit of Saddle Peak. looked like it ran down the south-central chute 1/3-1/2 way, but visibility was hard to confirm. May have gone farther. Didn't propagate wide. looked like within new snow. kind of a large volume loose snow slide. R1-D2.
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Cornice fall
R size
1
D size
2
Slab Thickness
16.0 inches
Slab Width
40.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Natural avalanche in Argentina Bowl
Argentina Bowl
Bridger Range
Code
SS-N-R2-D2-U
Elevation
8600
Aspect
E
Latitude
45.78740
Longitude
-110.93600
Notes
Forecaster note: From road on drive back from the Throne/northern Bridgers we saw a series of large, R2-D2 avalanche crowns (overlapping) on lookers left of center Argentina Bowl below cornices, near steep rocky cliffs in center. Used binoculars to confirm.
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
U - Unknown
Problem Type
New Snow
Slab Thickness
16.0 inches
Vertical Fall
1000ft
Slab Width
175.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Avalanche and cracking, Cooke City
Scotch Bonnet
Cooke City
Code
Elevation
10000
Aspect
S
Latitude
45.07220
Longitude
-109.94800
Notes
GNFAC Field observation
Avalanche, Chimney Rock, NW facing slope. From Daisy Pass we could make out fresh debris at same elevation as us. Could not see the crown, but upper slopes were rocky, thin and likely faceted. Visibilty was not good.
Cracking, Scotch Bonnet: We skied up a south facing slope to 10,000 and had shooting crackings in the new, wind drifted snow. The new snow is not bonding well to the old snow surface and it is breaking where it has been blown into slabs.
Number caught
0
Number buried
0
Problem Type
Wind-Drifted Snow
Attached Videos
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Near Lulu Pass the winds were loading slopes with new snow. We got cracking as we skinned uphill. The new snow is not bonding well to the old snow surface. Photo: GNFAC
Avalanche Details: Avalanche and cracking, Cooke City
Forecast link: GNFAC Avalanche Forecast for Mon Jan 21, 2019
Cooke City, 2019-01-20
Forecast link: GNFAC Avalanche Forecast for Mon Jan 21, 2019
The Bridger Range got 8-10" of new snow overnight (1/19-1/20) on top of 4-6" of snow from Friday (1/18). Last night's snow was equal to 1-1.5" of snow water equivalent. We got stable and unstable results in stability tests, but this heavy new load alone is enough to indicate large avalanches can break within or below this heavy snow. Photo: GNFAC
Avalanche Details: Natural avalanche in Argentina Bowl
Forecast link: GNFAC Avalanche Forecast for Mon Jan 21, 2019
Bridger Range, 2019-01-20
Forecast link: GNFAC Avalanche Forecast for Mon Jan 21, 2019