23-24

On 4/26/24 large natural wet slabs were seen running on Wall Mountain near Silver Gate. An observer from Beartooth Powder Guides sent us a video of them happening at 3pm while it was 43 degrees F. I also noted a similar large crown on the north side of Republic Mtn. that probably also happened this afternoon. Photo: GNFAC

Cooke City, 2024-04-26

On 4/26/24 large natural wet slabs were seen running on Wall Mountain near Silver Gate. An observer from Beartooth Powder Guides sent us a video of them happening at 3pm while it was 43 degrees F. I also noted a similar large crown on the north side of Republic Mtn. that probably also happened this afternoon.

Cooke City, 2024-04-26

On 4/26/24 large natural wet slabs were seen running on Wall Mountain near Silver Gate. An observer from Beartooth Powder Guides sent us a video of them happening at 3pm while it was 43 degrees F. I also noted a similar large crown on the north side of Republic Mtn. that probably also happened this afternoon. Photo: GNFAC

Cooke City, 2024-04-26

Wet slabs near Cooke City/Silver Gate

Date

On 4/26/24 large natural wet slabs were seen running on Wall Mountain near Silver Gate. An observer from Beartooth Powder Guides sent us a video of them happening at 3pm while it was 43 degrees F. I also noted a similar large crown on the north side of Republic Mtn. that probably also happened this afternoon.

Region
Cooke City
Location (from list)
Wall Mountain
Observer Name
Alex Marienthal

Wet slabs near Cooke City/Silver Gate

COOKE CITY
Cooke City
Code
WS-N-R2-D2.5-O
Elevation
8500
Aspect
N
Latitude
45.02020
Longitude
-109.93800
Notes

Wet snow activity on Wall Mountain near Silver Gate, Republic Mtn. and Henderson Bench near Cooke.

Number of slides
4
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
2
D size
2.5
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
36.0 inches
Vertical Fall
1000ft
Slab Width
220.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Whumps/Collapses in Beehive

Beehive Basin
Northern Madison
Code
Latitude
45.34070
Longitude
-111.39100
Notes

From obs: "When setting out to Beehive Basin today we only imagined wanting to bail if rain line was at the trailhead, but had not expected our seasons long standing PWL to turn us around. With a few inches of snow at the trailhead and temps just at freezing we set out. The new snow yesterday/last night capped a warm snowpack, keeping the snowpack from freezing at all (no crusts or other signs of superficial freezes up to 9,2000ft where we bailed despite the mid-20’s temps recorded overnight). Almost immediately out of the trailhead we got thunderous collapses so big we at first thought it was noise from control work at Big Sky. Further along we got collapses extending hundreds of feet out, valley wide and echoing up the basin. We dug to the bottom out of curiosity and found a saturated and unfrozen snowpack. The bottom 30cm was still all facets, giving the appearance that the remaining 90-110cm of consolidated snowpack was floating on air. We’re assuming the whumps/collapses are traveling along this layer of basal facets. I’m sure once it gets a solid freeze things will be alright again, but will the new snow continue to insulate the snowpack the next few nights despite the forecasted solid freezing temps? Or is this only a phenomenon that happens the 1st night of new snow falling on a warm snowpack? "

Number of slides
0
Number caught
0
Number buried
0
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year

Whumps/Collapses in Beehive on a saturated snowpack

Date
Activity
Skiing

When setting out to Beehive Basin today we only imagined wanting to bail if rain line was at the trailhead, but had not expected our seasons long standing PWL to turn us around. With a few inches of snow at the trailhead and temps just at freezing we set out. The new snow yesterday/last night capped a warm snowpack, keeping the snowpack from freezing at all (no crusts or other signs of superficial freezes up to 9,200ft where we bailed despite the mid-20’s temps recorded overnight). Almost immediately out of the trailhead we got thunderous collapses so big we at first thought it was noise from control work at Big Sky. Further along we got collapses extending hundreds of feet out, valley wide and echoing up the basin. We dug to the bottom out of curiosity and found a saturated and unfrozen snowpack. The bottom 30cm was still all facets, giving the appearance that the remaining 90-110cm of consolidated snowpack was floating on air. We’re assuming the whumps/collapses are traveling along this layer of basal facets.

Region
Northern Madison
Location (from list)
Beehive Basin
Observer Name
Christopher Kussmaul

Large wet avalanche near Texas meadows

Texas Meadow
Bridger Range
Code
WS-N-R3-D2-O
Elevation
7600
Aspect
SE
Latitude
45.83910
Longitude
-110.93700
Notes

from obs. 4/25/24: "Came across a relatively large wet avalanche when approaching Texas meadows from Bradley’s meadows. Elevation around 7600ft, aspect, SSE. Depth: to ground. 

Considering the new snow on top of the debris, I’m guessing this slid prior to the storm last week. The slide path was melted out to dirt. Out of curiosity, we dug just to the lookers right of the slide and found soft snow near the ground - still evidence of crystal structure but could make a snowball if squeezed. Best guess is that a point release wet slide entrained enough snow to step down and release the whole face."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
3
D size
2
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
24.0 inches
Vertical Fall
200ft
Slab Width
80.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year