Visibly thick wildfire smoke blocks sunlight from reaching the ground. This results in cooler temperatures in smoke-shaded areas. These cooler temperatures contribute to trapping smoke from active or smoldering fires, especially in valleys, leading to dangerously high smoke concentrations. Smoke shading impacts on local weather patterns have only been observed a few times in past research, and this study uses state-of-the-art Doppler lidar measurements from a moving truck to provide new insights. The smoke shading modified the lowest layers of the atmosphere, and caused flow patterns that transported the dangerously high concentrations of smoke away from the fire.