Mammoth Mountain - Patrol results

AVALANCHE OBSERVATION
Mammoth Mountain

Drainage:

Submission Info
Forecaster
Friday, January 6, 2017 - 11:00am
Red Flags: 
Recent avalanche activity
Avalanche Type: 
Dry
Slab
Trigger type: 
Other - explain below
Crown Height: 
More than 10 ft
Weak Layer: 
Old Snow
Avalanche Width: 
2 000ft.
Elevation: 
11 000ft.
Bed Surface: 
Old Snow
Avalanche Length: 
1 500ft.
More detailed information about the avalanche: 

Huge crowns resulting from explosive control measures on Mammoth Mountain this morning, see attached photos.  Over 12' tall crowns!  One small hand charge resulted in half of the upper mountain releasing (all of the drop outs and wipe outs through the hump).  Of note, some of these slopes had been shot with heavy artilery (40lb warheads) and didn't fail.  A 2lb handcharge in the sweet spot is what caused the entire release.  Stepped down to late november raincrust.  Also 4-6ft crowns in the chair 9 area.  

Avalanche Photos: 
Number of People Caught: 
0
37° 37' 50.9484" N, 119° 1' 57.882" W

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