Weather and Avalanche Log for Tue Jan 21, 2025
Temps Range from -11 F LH Ridge to +13 F in Hyalite
24-25
Wind Slab on E Henderson
Henderson Mountain
Cooke City
Code
N-R1-D2-O
Elevation
10000
Aspect
NE
Latitude
45.05240
Longitude
-109.94500
Notes
Wind slab avalanche on E Henderson North of the large slide path close to Fisher Pk. R1 D2,1-2' deep, 200' wide. It broke aprx 200' below the summit mid slope. Phone was too cold to take photos. It looks like it broke on the 19th. Wind slabs 5-10" deep were easy to trigger on test slopes North o Lulu pass. Active loading today on upper elevation SW-SE aspects. Multiple ECTX test results on S aspects at 8600' over the weekend.
Number caught
0
Number buried
0
Trigger
Natural trigger
R size
1
D size
2
Bed Surface
O - Old snow
Problem Type
Wind Slab
Slab Thickness
18.0 inches
Slab Width
200.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Wind Slab on E Henderson
Date
Activity
Snowmobiling
Wind slab avalanche on E Henderson North of the large slide path close to Fisher Pk. R1 D2,1-2' deep, 200' wide. It broke aprx 200' below the summit mid slope. Phone was too cold to take photos. It looks like it broke on the 19th. Wind slabs 5-10" deep were easy to trigger on test slopes North o Lulu pass. Active loading today on upper elevation SW-SE aspects. Multiple ECTX test results on S aspects at 8600' over the weekend.
Region
Cooke City
Location (from list)
Henderson Mountain
Observer Name
Beartooth Powder Guides
Wind slabs reactive at bridger bowl
Date
Activity
Snowboarding
Very reactive wind slabs developed overnight. 6-30inches thick.
Region
Bridger Range
Location (from list)
Bradley Meadow
Observer Name
Zach bailey
Wind Loading in Bradley Meadows
Date
Activity
Skiing
Wind loading on all aspects due to swirling winds. Cracking about 3-12” thick around top of wolverine forest. No signs of persistent slab instability, deep snowpack throughout.
Region
Bridger Range
Location (from list)
Bradley Meadow
Observer Name
Sydney
Thin wind slab in Maid of the Mist
Maid of the Mist
Northern Gallatin
Code
SS-AS-R1-D1-I
Latitude
45.41640
Longitude
-110.97000
Notes
From obs. 1/19: "Wind was swirling in Maid of the Mist yesterday, mostly upslope winds that were transporting snow, but inconsistently and were difficult to predict where they were loading. We did not find widespread wind loading, but did get a very small windslab to release just below the top of the ridge (max 3-4" thickness, see image)."
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind Slab
Slab Thickness
4.0 inches
Vertical Fall
20ft
Slab Width
20.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
From Obs. "Wind was swirling in Maid of the Mist yesterday, mostly upslope winds that were transporting snow, but inconsistently and were difficult to predict where they were loading. We did not find widespread wind loading, but did get a very small windslab to release just below the top of the ridge (max 3-4" thickness, see image)." Photo: C. Avis
Avalanche Details: Thin wind slab in Maid of the Mist
Forecast link: GNFAC Avalanche Forecast for Tue Jan 21, 2025
Northern Gallatin, 2025-01-20
Forecast link: GNFAC Avalanche Forecast for Tue Jan 21, 2025
Whumphs at Fairy Lake
Fairy Lake
Bridger Range
Code
Elevation
7000
Latitude
45.90900
Longitude
-110.95800
Notes
From obs 1/19: "We experienced whumphs the entire walk in from the parking lot and had a pretty sketchy time attempting to ski a glade directly above fairy lake."
Number caught
0
Number buried
0
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
Long shooting cracks in Cabin Creek
Cabin Creek
Southern Madison
Code
Aspect
SW
Latitude
44.89490
Longitude
-111.22800
Notes
From FB message 1/19: "In between redstreak peak and white peak... The whole slope cracked... the one I stopped on I put my leg in the crack and went to my knee inside the crack"
Screenshots from videos sent in messenger
Number caught
0
Number buried
0
Images
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
From FB message 1/19: "In between redstreak peak and white peak... The whole slope cracked..." C. Fregian
Screenshots from videos sent in messenger
Avalanche Details: Long shooting cracks in Cabin Creek
Forecast link: GNFAC Avalanche Forecast for Tue Jan 21, 2025
Southern Madison, 2025-01-20
Forecast link: GNFAC Avalanche Forecast for Tue Jan 21, 2025