What type of weather can one expect from moist, unstable air and very warm surface temperature?

Moist, unstable air combined with very warm surface temperatures creates an environment conducive to strong updrafts and the development of cumulonimbus clouds. When air is warm and humid, it rises because it is less dense compared to the surrounding cooler air. As this warm, moist air ascends, it cools and the moisture within it can condense to form clouds. In unstable conditions, the rising air continues to be buoyant, leading to the formation of strong updrafts.

Cumulonimbus clouds are typically associated with severe weather phenomena such as thunderstorms, heavy rainfall, and sometimes severe turbulence. This is due to the powerful vertical development of these clouds; they can grow high into the atmosphere and indicate potential for convective activity. This is in sharp contrast to the other options, which do not align with the characteristics expected under conditions of moist, unstable air and high surface temperatures.