What weather does fog mean in the morning?

Fog in the morning means it may be sunny or rainy.

In autumn and winter, the cold air in the north will go south. At this time, as the weather clears and the sun shines, the moisture content in the air will increase, which is easy to form radiation fog. As soon as the sun comes out, the radiation fog will disappear, so there is a saying that ten fogs and nine sunny days indicate good weather.

In spring and summer, warm and humid air from the sea meets the cold ground, which will condense water vapor into fog. This kind of fog, called advection fog, is formed when it is cold. When warm and humid air meets dry and cold air, it will rain, so the fog in spring and summer morning indicates rain.

rain

Rain is a natural precipitation phenomenon, which is caused by the disturbance of atmospheric circulation. It is an indispensable part of the earth's water cycle and the only way for almost all terrestrial plants far away from rivers to replenish fresh water. Rain usually appears in four forms: frontal rain, convective rain, topographic precipitation and typhoon rain. Its main component is water, with a small amount of sulfur dioxide and nitrogen dioxide. Usually, the PH value of rain is around 5.6, and rain with a PH value less than 5.6 is acid rain.

After the water on the earth is irradiated by sunlight, it becomes steam and is evaporated into the air. Water vapor condenses into small water droplets when it meets cold air at high altitude. These water droplets are very small, with a diameter of only 0.000 1 ~ 0.0002 mm, and the largest is only 0.002 mm.