Fire orange sunrise through foggy hillside in FingerLakes cover photo - 270683960

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Fog is often described as a stratus cloud resting near the ground. Fog forms when the temperature and dew point of the air approach the same value either through cooling of the air producing advection, radiation, or upslope fog or by adding enough moisture to raise the dew point producing steam or frontal fog. When composed of ice crystals, it is called ice fog. After sunrise, the faster the ground temperature rises, the faster fog and stratus clouds dissipate. Mist and fog act as a giant diffuser. The term mist is used if visibility is better than five-eighths of a mile. Anything less than that and it’s fog. Fog and mist are both created by water droplets, differing only in their overall locations and density. Fog is a cloud that reaches ground level, even if that ground is a hill or mountaintop. Fog is formed when any cloud type makes contact with the ground. In low-lying areas, such as valleys and plains, the fog bank called a mass of fog, is essentially a cloud formation subject to the same wind and temperature reactions clouds experience in the upper atmosphere. Mist forms wherever water droplets are suspended in the air by temperature inversion, volcanic activity, or changes in humidity. Fog is denser than mist and tends to last longer.