What weather is prone to fog?

In the morning of autumn and winter, it is easy to fog in February-April in spring.

If the ground heat is lost, the temperature drops and the air is quite humid, then when it is cooled to a certain extent, some water vapor in the air will condense out and become many small water droplets suspended in the air layer near the ground to form fog. Both it and clouds are caused by temperature drop, and fog can actually be said to be a cloud near the ground.

The temperature is higher during the day, so the air can hold more water vapor. But at night, the temperature drops and the capacity of water vapor in the air decreases, so some water vapor condenses into fog.

Especially in autumn and winter, due to the long nights, there are not many opportunities without Feng Yun, and the ground heat dissipation is faster than that in summer, which makes the ground temperature drop sharply, so that the water vapor in the air near the ground can easily reach saturation in the middle of the night, condense into small drops and form fog. The morning temperature in autumn and winter is the lowest and the fog is the thickest.

Conditions for fog formation:

The conditions for fog formation are cooling, humidification and concretion. Increase the water vapor content. This is caused by radiation cooling, which often occurs in sunny days, breezes, nights and early mornings with abundant and stable water vapor near the ground, or inversion. Meteorology calls it radiation fog.

The other is the fog formed by the horizontal movement of warm and humid air and the gradual cooling after passing through the cold ground or water surface, which is called advection fog in meteorology; Sometimes the fog formed by two reasons is called mixed fog. It can be seen that it is late autumn and early winter that meet these conditions, especially in the morning of late autumn and early winter.