This is a monsoon thunderstorm as seen from just west of Point Imperial near Mount Hayden on the North Rim of the Grand Canyon
I spent a long weekend hiking, backpacking and camping on the North Rim and down the North Kaibab Trail.
hikearizona.com/TLOGS_JUMP.php?ID=45027
hikearizona.com/decoder.php?ZTN=417&start=0&EXT=T...