Mammoth Basin Avalanche Information

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Mammoth Basin Avalanche Advisory

Friday, January 19, 2018 - 6:48am

Avalanche danger today will be CONSIDERABLE near and above treeline. Newly formed wind slabs could produce many small and even some large avalanches on leeward slopes. In isolated areas near treeline, wind slab avalanches could activate the remains of our persistent slab problem and potentially create avalanches that are quite large. Natural avalanches are possible; human triggered avalanches are likely.

Below ~9,000’, even with small amounts of new snow, coverage is thin and avalanches are unlikely.

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Recent Mammoth Observations

Location Date
Sherwin Ridge: Stubborn Wind Slabs and Persistent Weak Layers Thursday, January 11, 2018 - 9:00am
Snowpack obs from Crystal Lake Thursday, January 11, 2018 - 8:30am
Red Cone Bowl - Wind effects and whoomphing Wednesday, January 10, 2018 - 2:30pm
Avalanche Activity in the Mammoth Region Wednesday, January 10, 2018 - 2:30pm
Red Cone Approach Trees Tuesday, January 9, 2018 - 3:30pm
Red Cone Bowl - New snow Tuesday, January 9, 2018 - 2:00pm
Whumphing in Hollywood Bowl Area Tuesday, January 9, 2018 - 1:00pm

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