Northern Madison

Test Pit Observations in Beehive

Date
Activity
Skiing
Snowboarding

Our group conducted an East facing snow pit on the top of the East Beehive Ridge at around 9100’, at 1 pm. Sky was OVC, wind from W at 5 mph. Snow pit was on a 15° slope.  The total snow depth was 135 cm. Our results were an ECTN 22 at 35 cm down, a PST 34/100 End and 85 cm down, and a DT 21 PC at 100 cm down. No observed wind slabs on ridge south of Prayer Flag Trees. No signs of wet loose such as rollerballs at 4 pm. 

Region
Northern Madison
Location (from list)
Beehive Basin
Observer Name
MSU AVY 2 Class

2 slides in Upper A-Zs

Date
Activity
Skiing

Saw 2 small avalanches running down the upper A-Zs when I was standing at the top of the Gullies at 10:44am. No ski patrollers in sight. I got a video of them moving but didn’t catch the start. Sun was directly hitting the ridge at the time. 

Region
Northern Madison
Location (from list)
Big Sky Resort

Small Avalanches on Test Slopes, Buck Ridge

Buck Ridge
Northern Madison
Code
SS-ACc
Latitude
45.17190
Longitude
-111.38000
Notes

From obs: "On a small test slope near Muddy Creek we intentionally triggered several small avalanches in wind loaded terrain." 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Cornice fall triggered by human or explosive action
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
Problem Type
Wind-Drifted Snow
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural Avalanches near Buck Ridge

Buck Ridge
Northern Madison
Code
SS-N-R1-D1
Aspect
E
Latitude
45.17190
Longitude
-111.38000
Notes

From obs: "Behind McAtee Basin, we saw a small natural wind slab avalanche on an east facing slope, and we saw a natural wind slab in Bear Creek." 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Problem Type
Wind-Drifted Snow
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

On a small test slope near Muddy Creek we intentionally triggered several small avalanches in wind-loaded terrain by knocking chunks of cornice off. Photo: GNFAC

Northern Madison, 2024-03-24