[DOC] [TLE] Fog - Wikipedia [PAR] Fog is a visible mass consisting of cloud water droplets or ice crystals suspended 
in the air at or near the Earth's surface. Fog can be considered a type of low-lying 
cloud and is heavily influenced by ... Fog forms when the difference between air 
temperature and dew point is generally less than 2.5 C or 4 F. Fog begins to... [DOC] [TLE] Dew, Fog and Clouds - cimss [PAR] If the air and the surface cools to the dew point, the temperature at which 
saturation occurs, dew forms. ... Dew, frozen dew and frost form in shallow layers 
near the surface. ... Wet haze - condensation can occur at relative humidity of 80
%. ... RADIATION (GROUND) FOG - produced by the radiational cooling at the 
surface. [DOC] [TLE] Condensation - The Water Cycle, from USGS Water-Science School [PAR] Condensation is the process by which water vapor in the air is changed into 
liquid water. ... These clouds may produce precipitation, which is the primary 
route for water ... Condensation is responsible for ground-level fog, for your 
glasses fogging ... form in the atmosphere because air containing water vapor 
rises and cools. [DOC] [TLE] (Ground) Fog - CFI Notebook [PAR] Fog can be extremely important to a pilot, especially when flying to an ... Occurs 
by cooling air to dew point or adding moisture to the air; Fog will form ... off the 
ground; As the surface cools by radiation, the adjacent air also is cooled ... This 
type of fog forms when warm raindrops evaporate into a cooler drier layer of air 
near... [DOC] [TLE] Chapter 6, Part 1 Dew Condensation Nuclei [PAR] Dew and Fog. Dew.  At night cool air near the ground ... point and saturation 
occurs, ... While water condenses on surfaces near the ground, it can also form 
on condensation nuclei, which are ... adding moisture to the air (advection, 
upslope,. [DOC] [TLE] fog facts, information, pictures | Encyclopedia.com articles about fog [PAR] Fog can form in two ways: either by cooling the air to its dew point (e.g., radiation 
... upslope fog), or by evaporation and mixing, when moisture is added to the air 
by ... cools the shallow moist air layer near the ground to its dew point or below,... [DOC] [TLE] Fog - Dictionary definition of Fog | Encyclopedia.com: FREE online ... [PAR] Fog forms either by air cooling its dew pointresulting in radiation fog, advection 
fog, or upslope fogor by evaporation and mixing, when moisture is added to the 
air by ... Radiation fog (or ground fog) generally occurs at night, when radiational 
... of air near the surface may cool to below its dew point to form advection fog,... [DOC] [TLE] Fog - Aviation Weather [PAR] Fog may form (1) by cooling air to its dew point, or (2) by adding moisture to air 
near the ... The fog forms almost exclusively at night or near daybreak. Terrestrial 
radiation cools the ground; in turn, the cool ground cools the air in contact with it. [DOC] [TLE] Chapter 5 Fog, Clouds, and Precipitation - Farmingdale State College [PAR] Thus fog and/or clouds can consist of water droplets, ice crystals, or both. ... The 
moist air will cool adiabatically to form upslope fog providing the air is already. [DOC] [TLE] CHAPTER 4 Moisture in the atmosphere - Routledge [PAR] warm air will result in a lot of latent heat release, cool air will produce less latent 
heat. The rate of ... It may do this by water being added or by cooling of the air. ... 
Fog is formed when air near the ground is cooled to dew point temperature. The 
... Precipitation may form as a result of collision and coalescence within a cloud. [DOC] [TLE] How Ground Fog Forms | Actforlibraries.org [PAR] Fog at ground surface can reduce visibility to about 1 km (62 miles). ... Fog forms 
when the temperature of air is reduced to its dew point or when moisture is added 
to air at ground level. ... Ground fog usually forms at night,

Question: Fog may form when air cools to this "point" or when moisture is added to air near the ground
Answer: Dew point