Mammoth Mountain officials said the slide occurred during avalanche mitigation work following a significant Sierra Nevada snowstorm, during which about six feet of snow fell in 36 hours.

Claire Murphy was conducting "avalanche mitigation" work on Valentine's Day when she and a colleague were caught in an avalanche. Ski resort officials announced her death Saturday.

A Mammoth Mountain ski patroller who was injured in an avalanche last week has died, according to the resort. On Saturday, Mammoth Mountain Resort said ski patroller Claire Murphy died Friday night after she was caught in an avalanche on Feb.

Murphy was doing avalanche mitigation with a team of ski patrollers on Lincoln Mountain — a dome peak within the Mammoth Mountain ski area — when an avalanche broke loose in an area known as the Avalanche (Avy) Chutes on Friday, Feb. 14. The accident occurred after approximately six feet of snow fell in 36 hours following a heavy Sierra snowstorm.

Two ski patrol members were trying to mitigate the threat of an avalanche after a storm had dumped about 6 feet of snow on the mountain in 36 hours.

Claire Murphy and another ski patroller were injured on February 14 after being caught in an avalanche on Lincoln Mountain.

Two ski patrol staff at Mammoth Mountain were caught in an avalanche while doing mitigation work after an atmospheric river dropped about six feet of snow in 36 hours, Mammoth Mountain officials said.

Murphy was one of two ski patrollers swept away by an avalanche on Lincoln Mountain in the resort while doing avalanche mitigation following a heavy snowstorm, the resort said. It was closed to the public at the time. The second patroller was uninjured by the 11:30 a.m. avalanche, the resort said. Murphy was hospitalized with serious injuries.

On Valentine's Day, two Mammoth Mountain ski patrollers were caught in an avalanche in the Avy Chutes area of the resort.

A Mammoth Mountain ski patrol employee has died after sustaining serious injuries last week from an avalanche.