1 climber killed and 2 injured in rockfall and CNNWeather on Longs Summit is fickle. The weather at the summit of Longs Mountain could shift greatly. It can be vital to monitor the forecast and be ready for any kind of weather conditions before Longs Mountain. The mountain is famous for its abrupt weather changes as well as risky storms. Dressing in layers and bringing spare gear like precipitation coats, caps, and mittens is critical to stay safe from inclement weather.