There is a very heavy fog outside now, visibility in different parts of the city of Dushanbe is from 5 to 20 m. How does heavy fog arise and what are the reasons for its formation? In addition to heavy fog in different parts of the city, fog is observed with frost (crystals of frozen moisture on various objects) can occur under certain weather conditions. Here are a few possible reasons:
High humidity in the air. When the air contains a large amount of water vapor, it can condense as fog or frost when the temperature decreases.
Temperature inversion. This is a condition in which a layer of warm air is trapped under a layer of cold air. In such conditions, the updrafts with moisture cannot overcome the cold layer and rise up, which leads to the formation of fog.
No wind. The wind can disperse the fog, carrying it away. In the absence of wind, fog can accumulate and become more dense.
Weather conditions. Heavy fog with frost can occur in cold weather when the temperature drops below 0 °C (-1 ° C in the city now).
It is important to note that fog and frost are dangerous for traffic and create inconveniences for people, especially for those who suffer from respiratory diseases.
Pictures from publicly available sources
24.12.2024