What type of air mass produces unstable air associated with turbulence and good visibility?

The type of air mass that produces unstable air associated with turbulence and good visibility is indeed the cold air mass. Cold air masses tend to be dense and can lead to significant differences in temperature when they interact with warmer surfaces or air masses. This temperature gradient creates instability in the atmosphere, which can result in vertical wind movements, leading to turbulence.

Additionally, cold air masses often provide good visibility because they are typically less humid than warm or moist air masses, which can lead to the presence of clouds and precipitation. Unstable conditions allow for the rapid development of convection currents, which can enhance turbulence but also keep the air clear due to the lack of moisture, unless there are other influencing factors.