An experienced American climber died in her partner’s arms in Nepal after being swept up in an avalanche while climbing the world’s fifth-tallest peak. Shelley Johannesen, a mom of three from Oregon, was killed as she was descending from the summit of Mount Makalu on Monday. The 53-year-old, who was a co-founder of the US-based outfitter Dash Adventures, was with her partner and two Nepali guides at the time. Shelley Johannesen, a mom-of-three from Oregon, was killed as she was descending from the summit of Mount Makalu in Nepal on Monday. Shelley Johannesen/Facebook “I am heartbroken to share that my beloved Shelley Johannesen passed away in the early morning hours on Nepal’s Mount Makalu on Monday,” her partner, Dave Ashley, said in a social media statement.…