After being caught in a hailstorm on day one 7/22 of our two day trek to conquer Mt Whitney we were about a mile from the summit on 7/23 at about 11:30 when the clouds started to darken and we decided to abort. Got past the switch backs but still exposed above the tree line when the hail and lightning started again.Pretty scary. Hope we made the right decision. Came from the Midwest so probably won’t try again but in hindsight I would encourage hikers to get to summit as early as possible.