– The attraction of two masses to one another. Large masses have higher values of gravitational accelerations than lighter masses.

The warming of the atmosphere by the trapping of earth’s longwave radiation being radiated to space. The gases most responsible for this effect are water vapor and carbon dioxide.

– Fog produced over the land by the cooling of the lower atmosphere as it comes in contact with the ground. Also known as radiation fog, and in parts of California as tule fog.

– the period of time between the last killing frost of spring and the first killing frost of autumn

– A brief sudden increase in wind speed. Generally the duration is less than 20 seconds and the fluctuation greater than 10 mph.

– The leading edge of the downdraft from a thunderstorm.

– Precipitation of small balls or other pieces of ice (hailstones) falling separately or frozen together in irregular lumps. (Typically associated with thunderstorms and surface temperatures above freezing).