Road Observations on Apr 9th

Location Name: 
BNSF Avalanche Safety - JFS Canyon
Observation date: 
Thursday, April 9, 2020 - 13:15

Is this an Avalanche Observation: 
Yes
Observation made by: Public

Location

Tabs

Quick Observation

Windshield observations of avalanche activity from Hwy 2. Numerous D1 to D1.5 wet loose on E-S-W aspects along with a few D2s. One D2 slab on the east face of Snowslip Mtn. in Shields Creek. More information under Avalanche Details tab. 

Snowpack, Avalanche, Weather Images: 
Avalanche Details
Avalanche Details: 
Date and Time of Avalanche: 
Tuesday, April 7, 2020 - 12:15
Number of avalanches: 
1
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
Old snow
More information or comments about the avalanche: 

From the photo the crown looks partially filled in, so thinking this is a few days old. It was not there on the afternoon of the 6th. Almost looks like two different events? Upper slope looks to be cornice fall which popped out slab on slope directly undereath? Then secondary, larger avalanche may have been triggered next. Could not see the terminus of debris so vertical run is best guess based on knowledge that the terrain benches out about 500 feet below the crown.

Hide Trigger
Trigger: 
natural
Trigger Modifier: 
Cornice Fall Triggered
Hide Terrain
Aspect: 
East
Starting Elevation: 
6800
Hide Size
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R3 Medium
Crown Height: 
2 ft
Avalanche Length (Vertical Run): 
500ft.
Avalanche Width (Average width): 
200ft.
Avalanche Location: 
Date and Time of Avalanche: 
Wednesday, April 8, 2020 - 15:30
Number of avalanches: 
10
Avalanche Type: 
Wet Loose
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 

Multple wet loose in Path 1163, combined debris D2-size

Hide Trigger
Trigger: 
natural
Hide Terrain
Aspect: 
South
Starting Elevation: 
above-treeline
Hide Size
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R1 Very Small
Avalanche Length (Vertical Run): 
2000ft.
Avalanche Location: 
Date and Time of Avalanche: 
Wednesday, April 8, 2020 - 15:30
Number of avalanches: 
6
Avalanche Type: 
Wet Loose
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 

Multiple wet loose in Shed 11, combined debris was D2-size

Hide Trigger
Trigger: 
natural
Hide Terrain
Aspect: 
South
Starting Elevation: 
near-treeline
Hide Size
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R1 Very Small
Avalanche Length (Vertical Run): 
1500ft.
Avalanche Location: 
Date and Time of Avalanche: 
Wednesday, April 8, 2020 - 15:30
Number of avalanches: 
10
Avalanche Type: 
Wet Loose
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 

Multiple wet loose in Shed 10, combined debris was D2-size

Hide Trigger
Trigger: 
natural
Hide Terrain
Aspect: 
South
Starting Elevation: 
near-treeline
Hide Size
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R1 Very Small
Avalanche Length (Vertical Run): 
2000ft.
Avalanche Location: