18-19

Skier triggered slide on Blackmore

Mt Blackmore
Northern Gallatin
Code
SS-ASc-R2-D2-I
Elevation
10000
Aspect
N
Latitude
45.44510
Longitude
-111.00400
Notes

 From e-mail: "A s ski cut at the top of the slope produced a s soft slab avalanche (R2 D2 SS). The crown was 10" deep and 60' wide. Several other skiers had skied a line to the skiers right of our route with no obvious signs of instability or avalanches. No natural avalanches were observed with the exception of some small wet point release slides on the E face of Mt Blackmore."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
2
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
10.0 inches
Vertical Fall
800ft
Slab Width
60.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural wet slabs on Fan Mtn.

Fan Mountain
Northern Madison
Code
WS-N-R3-D3-O
Elevation
10000
Aspect Range
E-N
Latitude
45.29910
Longitude
-111.52200
Notes

Natural wet slabs were widespread on Fan Mtn. near Big Sky during the week of 5/13-5/16.

Multiple Avalanches
Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
3
D size
3
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Natural Wet Slab in Beehive

Beehive Basin
Northern Madison
Code
WS-N-R4-D2.5-O
Elevation
9600
Aspect
S
Latitude
45.35080
Longitude
-111.40400
Notes

Skiers saw a large wet slab that released naturally sometime before 0745 on Tuesday (5/14). 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
4
D size
2.5
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
48.0 inches
Vertical Fall
500ft
Slab Width
250.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year