In turn, fog affects many human activities, such as shipping, travel, and warfare. Fog appears when water vapor (water in its gaseous form) condenses. During condensation, molecules of …

Fog, cloud of small water droplets that is near ground level and sufficiently dense to reduce horizontal visibility to less than 1,000 metres (3,281 feet). The word fog also may refer to …

Steam fog forms when cold air moves over warm water. When the cool air mixes with the warm moist air over the water, the moist air cools until its humidity reaches 100% and fog forms.

1 day ago · The vast blanket of low-hanging fog formed as a result of cold weather, calm winds and moist soils in California's Central Valley.

Nov 29, 2025 · As temperatures drop around the country, fog can become much more dangerous this time of year. Fog can form in a variety of weather conditions. When warm raindrops …

2 days ago · The right combination of conditions allowed this distinctive low cloud to form in California’s Central Valley for weeks.

Oct 19, 2024 · Learn about fog in meteorology. Discover the definition, how and why fog forms, the different types, and how it differs from other phenomena.

The meaning of FOG is vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground. How to use fog in a sentence.

Jul 8, 2025 · Fog, as a generic term, refers to any suspension of small droplets in a gas. In the case of the atmosphere, these droplets are water and are suspended in the air near or at …

4 days ago · The type of fog is called radiation fog, or tule fog. Instead of forming over the ocean, like typical summer fog, this wintertime fog forms over the inland valley areas.