The couloirs on Missouri's north face should be avoided except when snow covered and only by those who are properly experienced and equipped. When descending, please avoid the scree slopes, as rare plants are tenuously existing there. Daytime temperatures range from 40-70 degrees in the summer months. Be prepared for changing weather. Carry rain gear and extra layers of warm clothing.
Lightning storms build rapidly and occur almost daily throughout the summer.
Turn around at the first sign of thunder and lightning. Carry a topographical map and compass and know how to use them. Be aware of exposure to intense sunlight. Wear sunscreen and a hat. Know the symptoms of altitude sickness.