Abstract: The complex nature of valley airflow highlights the importance of observing low-level wind profiles and related vertical velocities. Such observations are crucial for advancing the study of mountain cloud-fog physics and providing technical guidance for weather modification operations. Utilizing the cloud and fog experiment station (CFS) on Mt. Lu located in the valley, wind profile observations were conducted with a Doppler wind lidar from November to December 2019. These measurements revealed a strong correlation between the 80-m wind speed and direction at CFS and the 10-m wind at the meteorological station of Mt. Lu. At the CFS site, the 80-m vertical velocity mostly ranged from 0.5 m s⁻¹ to −0.5 m s⁻¹, while horizontal wind speeds ranged from 2 m s⁻¹ to 4 m s⁻¹, respectively. The average wind speed at the CFS site increased with height, but daytime wind speeds were generally lower than nighttime speeds. The difference between day and night wind speeds also increased with height, with a discrepancy of −1 m s⁻¹ at 80 m and −0.2 ms⁻¹ at 40 m. Vertical movement was closely linked to airflow direction. The vertical velocity was proportional to the horizontal wind speed. The 80-m southerly wind (112.5°–247.5°) at the CFS site primarily caused upward airflow, while other wind directions were dominated by downward airflow. This pattern extended from 80 m to 260 m. Weak wind shear of low-level airflow at the CFS site can lead to vertical motion stratification, underscoring the increased complexity of airflow in mountainous terrain compared to flat plains.