24-25

We rode into Tepee Basin and to the north wilderness boundary. There was 1.5-2 feet of new snow that fell since Thursday. We dug (3) snowpits on northeast, north and southeast slopes, between 8800'-9200'. The pits on northerly slopes had ECTP 17 and 22 on a thin weak layer below the new snow. We also had ECTP 6 within the storm snow. Photo: GNFAC

Southern Madison, 2025-03-16

New snow and wind in Tepee Basin

Date
Activity
Snowmobiling

We rode into Tepee Basin and to the north wilderness boundary. It was snowing all day with moderate winds and some strong gusts in more open areas. We could only slightly see the bottom of some avalanche path, but did not see any signs of avalanches (there could have been some higher up in terrain obscured by clouds.)

There was 1.5-2 feet of new snow that fell since Thursday. We dug (3) snowpits on northeast, north and southeast slopes, between 8800'-9200'. The pits on northerly slopes had ECTP 17 and 22 on a thin weak layer below the new snow. We also had ECTP 6 within the storm snow.

There was minimal cracking across the surface in the new snow, but plenty of signs of fresh drifts. It felt likely you would easily trigger storm slab or wind slab avalanches on steep slopes.

Region
Southern Madison
Location (from list)
Tepee Basin
Observer Name
Marienthal and Zinn

Isolated Wind Slabs in S. Bridger Range

BRIDGER RANGE
Bridger Range
Code
SS-AS-R1-D1-I
Latitude
45.85120
Longitude
-110.94800
Notes

From email: Isolated wind slabs today in the southern Bridgers.

Number of slides
1
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
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Isolated Wind Slabs in S. Bridger Range

Date
Activity
Skiing

From email: Isolated wind slabs today in the southern Bridgers.

Region
Bridger Range
Location (from list)
BRIDGER RANGE
Observer Name
Elana Selinger

Small wind slabs on Buck Ridge

Buck Ridge
Northern Madison
Code
SS-AMc-S
Elevation
9000
Aspect
N
Latitude
45.17190
Longitude
-111.38000
Notes

Up to a foot of soft snow which seemed to have included a few inches from last weekend. Winds were transporting snow across Buck Ridge all day long.

We triggered two small and shallow wind slabs that didn't go anywhere, but they were a warning of bigger wind slabs on bigger slopes. We didn't find any faceted or weak layers of concern in the snowpack. 

Wind slabs will grow in size overnight and will be the main concern tomorrow. Fortunately they will be easy to see an avoid.

 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Snowmobile
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
Bed Surface
S - Avalanche released within new snow
Problem Type
Wind Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Buck Ridge

Date
Activity
Snowmobiling

Up to a foot of soft snow which seemed to have included a few inches from last weekend. Winds were transporting snow across Buck Ridge all day long.

We triggered two small and shallow wind slabs that didn't go anywhere, but they were a warning of bigger wind slabs on bigger slopes. We didn't find any faceted or weak layers of concern deeper in the snowpack. 

Wind slabs will grow in size overnight and will be the main concern tomorrow. Fortunately they will be easy to see an avoid.

 

Region
Northern Madison
Location (from list)
Buck Ridge
Observer Name
Staples and Gerardi