What happened
While operating at LGU, the flight crew initially attempted a GPS approach for runway 35. Due to a lack of visibility regarding the runway environment, the pilot initiated a missed approach. During the subsequent maneuver, the crew observed the approach end of runway 17 between 4,000 and 5,000 feet and decided to circle northwest to prepare for a visual landing on runway 17.
During the landing phase, the pilot reported that the approach was slightly above the ideal glide path, resulting in a flare that was higher than usual. As the aircraft descended, it entered a layer of fog just before touching down. During the flare, the aircraft drifted toward the left side of the runway. The left main landing gear struck a snow berm shortly after the aircraft settled onto the runway. This impact caused the aircraft to veer sharply to the left and depart the runway surface. The excursion resulted in the separation of the nose gear, damage to the radome, and a breach in the cockpit pressure bulkhead.
At the time of the incident, the METAR for LGU indicated extremely poor weather conditions, characterized by calm winds and visibility of only 1/4 statute mile within freezing fog. The vertical visibility was reported at 100 feet above ground level, with temperatures at minus 7 degrees Celsius.