NORDEN, Calif. (AP) – Crews have resumed their search for a ski instructor who went missing at a Northern California ski resort.

The Placer County Sheriff’s Office says search-and-rescue teams are focusing on an avalanche slide area where the phone of 23-year-old Carson May lasted pinged.

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The office said Sunday ground searches have been deployed but that a helicopter is on standby until the weather clears.

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May was last seen skiing while off duty on Thursday afternoon at Sugar Bowl Ski Resort near Norden. He was supposed to get a ride home but didn’t show up.

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Friends reported him missing Friday morning after he didn’t make it home and his belonging were discovered in his locker at the ski resort.