Rich Bingham, ski safety director at Sun Valley, said the avalanche occurred in Lookout Bowl Sunday. In three days, the ski resort has received about 37 inches of snow, which equates to about 3.83 inches of water precipitation in the snow.
"Every time it snows we try to reduce the hazard," Bingham said.
Sunday's avalanche was massive in scale. A photo posted on Facebook shows snow piled up around the bottom of the Seattle Ridge chairlift.
"It was a big slide, it was pretty impressive," he said "Slides that big don't happen very often here."
Ski patrol crews are working on explosive testing to check stability in the area and to reduce any hazards. Officials will be monitoring activity in adjacent bowls on the north side including Easter Bowl, Lookout, Mayday and the Upper Bowl area.
The avalanche, which Bingham described as a "pretty large one" occurred before the area was open to skiers.
No injuries were reported.
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