By Madeline Coleman She became the first known woman to climb both Everest and Lhotse in the span of 24 hours back in 2012. U.S. ski mountaineer Hilaree Nelson’s body was found Wednesday after she died during an expedition in Nepal, her partner Jim Morrison confirmed on social media. Morrison detailed in an Instagram post how the pair were skiing from Manaslu’s summit to rejoin their sherpa team when Nelson “started a small avalanche.” Nelson “was swept off her feet and carried down a narrow snow slope down the south side,” Morrison wrote. “I did everything I could to locate her but was unable…