What is an expected weather condition during high humidity and unstable air without a lifting force?

The presence of high humidity and unstable air without a lifting force indicates that while there may be moisture in the atmosphere, there isn't the necessary vertical movement of air to initiate the formation of clouds and precipitation immediately. However, unstable air is characterized by the potential for rapid vertical movements, and when combined with high humidity, it can lead to significant weather phenomena.

Under these conditions, the atmosphere can become conducive to convection, especially if there are changes in temperature or slight variations in air pressure. As the sun heats the surface, localized heating can eventually initiate vertical air currents even in seemingly stable conditions. If these currents become robust, they can develop into thunderstorms. Therefore, while there may not be immediate lifting, the combination of instability and humidity creates an environment where thunderstorms could develop quite suddenly, making the option of potential thunderstorms a valid and significant outcome in these conditions.

In contrast, while fog typically forms with high humidity, it usually requires stable air and little to no wind. Clear conditions or no significant weather would not be expected in these circumstances due to the inherent instability and moisture present.