Moisture and Atmospheric Stability”The stability of air in the atmosphere depends on the temperature of rising air relative to the temperature of the stationary surrounding air that it passes through, which varies from place to place and with changing atmospheric conditions. Air stability determines whether clouds form when air is uplifted, and the type of cloud.A Stable atmosphere forms when warmer surfaces rise, therefore expanding and cooling which causes the air to become heavy and causing it to sink to its original position at the surface.