A Dillon, Mont., snowmobiler became the latest regional avalanche victim when he died Saturday in a slide in Lincoln County south of Jackson.

Bob Turney, 50, was uncovered by fellow snowmobilers in the Squaw Creek area of the Wyoming Range, Lt. Brian Andrews of the Lincoln County Sheriff’s Office said Monday. His three companions found him using an avalanche beacon and uncovered him using shovels, Andrews said.

Turney’s death is the second snowmobile fatality in the area in two weeks and the seventh in the U.S. this season. Avalanches have killed 13 people in the country this winter, according to the clearinghouse Avalanche.org.

Forecasters rated the avalanche danger “considerable” Saturday, the midpoint on the five-step rating system. It means human-triggered avalanches are probable.

The forecast, available at www.jhavalanche.org, said Saturday morning that snowmobiles were likely triggers given a weak layer low in the snowpack.

“Poorly supported slabs could be triggered by a single person, and more likely by heavier loads such as snowmobiles,” the report said.

The hard-slab avalanche ran on a south-facing slope at an elevation of about 9,000 feet, according to the Bridger-Teton National Forest Avalanche Center, which forecasts for the area. Andrews said the slide was about 15 yards wide and broke a crown 4 feet deep. He did not know how deep Turney was buried.

The event, and another avalanche in the range in which a snowmobiler survived, “are sad reminders that deep-slab instability persists in the region,” forecasters wrote.

The snowpack in the Greys River area where Turney died is “more fragile” than in other ranges, forecasters said. The avalanche center has separate daily forecasts for each of the Teton, Togwotee Pass and Greys River areas.

“It sounds like these guys were prepared for such an event,” Andrews said. “Still, it’s one of these things that’s a tragedy.”