What is the reason for the flight delay?

(78)Attention passengers traveling on flight 525 to Salt Lake City.(77)Unfortunately, the plane you’ll be boarding has been delayed in Richmond due to inclement weather.(79)It is scheduled to arrive in about an hour, which means the new departure time will be 12 p.m. As soon as it arrives, our crew will prepare the aircraft for departure and we will board everyone as quickly and safely as possible. We ask that you stay near the gate in case we have any further announcements. We sincerely apologize for the inconvenience and we appreciate your cooperation.