1 climber killed and 2 injured in rockfall and CNNAtmospheric conditions on Longs Mountain may be volatile. Conditions atop Longs Peak could change drastically. It is crucial to check the weather forecast and be equipped for any kind of climate conditions ascending Longs Mountain. The mountain is known for its sudden weather shifts and dangerous weather events. Dressing in layers and bringing spare gear like rain coats, hats, and mittens is crucial to be safe from the elements.