30
2008
Just to make things clear, here is a simple definition of fog: Fog is a cloud in contact with the ground. Fog differs from other clouds only in that fog touches the surface of the Earth. The same cloud that is not fog on lower ground may be fog where it contacts higher ground such as hilltops or mountain ridges. Fog is distinct from mist only in its density. Fog is defined as cloud which reduces visibility to less than 1 km, whereas mist is that which reduces visibility to less than 2 km. Fog forms when the difference (Δ) between temperature and dew-point are 3 °C, or less, especially around rivers. (Courtesy of Wikipedia) (more…)
Just to make things clear, here is a simple definition of fog: Fog is a cloud in contact with the ground. Fog differs from other clouds only in that fog touches the surface of the Earth. The same cloud that is not fog on lower ground may be