What are the signs before the weather is going to rain!

The humidity of the air increases, the fish come to the surface to exhale, the sky darkens, the dragonflies fly low, and the weather forecast from the previous day suggests.

The air is sweltering, swallows fly low, and ants move.

Ants move snake aisles, and there will be heavy rain tomorrow.

The above is incomplete, it should be the sky is cloudy with rumbling thunder.

The air is sweltering, frogs swim, ants move.

The signs before the rain are:

1.Drop in temperature: Rainy weather is usually accompanied by a drop in temperature, so if you feel that the temperature is significantly lower, you may want to consider whether it will rain.

2.Darkening of the sky: The sky can become darker and sometimes cloudy before the rain, so if the sky becomes gray or overcast, it could be a sign of rain.

3.Low pressure in clouds: Before rain, the air pressure is low, and the clouds are denser, and some low-pressure weather phenomena will occur, such as headache, fatigue, dry throat, etc.

4.Increased winds: Before rain, due to the influence of low pressure areas, the wind will increase, and lightning and thunder may also occur, which is also one of the signs of rain.

5.Aggravated plant odor: Before rain, due to the increase of negative ions in the air, the plants will release more volatile substances, making the plant odor in the air more intense, which is also a sign of rain.

6.Swallows fly low: Swallows fly high on sunny days, and when it is about to rain, they will fly low frequently.

7.Ant moving: Ants that live underground will move to higher places when they feel that it is going to rain so as not to be flooded by rain.

8.Frog croaking: Frogs are very sensitive to changes in air pressure, and when the air pressure becomes low and the air humidity increases, they will croak.

9.Long worm aisle: Snakes are also very sensitive to changes in air pressure, and before it rains, the air humidity increases and becomes stuffy, and snakes will burrow out of the ground to breathe.

10.Earthworm unearthing: Earthworms live underground, once the weather is about to rain, the heat and lack of oxygen will force them to climb out of the ground, so earthworms are unearthed, which is also a precursor to rain.

11.Fish jump out of the water: Before rain, the air pressure becomes lower, the air humidity increases, and the oxygen content in the water decreases, and the fish jump out of the water to breathe.

12.Dragonfly low: Dragonfly low-flying is a common pre-rain sign that usually occurs before a summer thundershower.

These signs may not always be present, but if several signs occur at the same time, it is more likely that it will rain.

Due to the fact that the air contains more water vapor in rainy days or before rain, the average molecular weight of the air decreases, i.e. the density of the air decreases, resulting in a decrease in air pressure. The higher the temperature, the more the pressure decreases in rainy weather, so people will feel chest tightness before the rain in summer (people's inhalation is forced by the pressure of the outside atmosphere, and of course the change in the oxygen content of the air is also related). Windy, cloudy and cloudy.

Generally, before the rain arrives, the air humidity will increase significantly, and the air pressure will also decrease significantly.

Since ancient times, it has been well known that frogs chirping and swallows flying low are the precursors of rain, and they are quite accurate. There are several more:

Ants crossing the street and burrowing in the ground one by one feel that the hole will be flooded if it rains, and they will flee before it rains.

Earthworms come out of their holes – The ground is moist and soft, and earthworms will crawl out of the ground, indicating that it is going to rain.

Other signs of mosquitoes swarming, rain ant swarms, etc. before the rain.

Frog chirping, swallows flying low and other precursors of rain, quite accurate. There are several more:

Ants crossing the street and burrowing in the ground one by one feel that the hole will be flooded if it rains, and they will flee before it rains. Earthworms come out of their holes – The ground is moist and soft, and earthworms will crawl out of the ground, indicating that it is going to rain. Other signs of mosquitoes swarming, rain ants swarming, cats washing their faces, etc.

Overview. When it rains, how do these small droplets grow their size to more than 1 million times? It mainly relies on two means:

One is the increase of condensation and condensation, and the other is the increase of the collision and increase of cloud droplets. In the early stages of raindrop formation, cloud droplets mainly rely on the continuous absorption of water vapor around the cloud body to condense and condense themselves.

If the water and gas energy sources in the cloud are constantly replenished and the surface of the cloud droplets is often supersaturated, then this condensation process will continue, causing the cloud droplets to grow and become raindrops. However, sometimes the amount of water vapor in the cloud is limited, and in the same cloud, the water vapor is often in short supply, so that it is impossible to make each cloud drop increase into a larger raindrop, and some smaller cloud droplets have to be merged into the larger cloud droplets. If water droplets and ice crystals coexist in the cloud, the process of condensation and bloom increase will be greatly accelerated.

1. Spider web: "Spider web, long rain will be clear." "On rainy days, if the air pressure rises, the humidity decreases, insects fly high, and spiders open their webs to prey on insects, it indicates that the weather will be clearer.

Conversely, the spider closes its web, indicating that it is about to rain. 2. The frog screams: When the air is dry, the frog's water evaporation accelerates, and it will stay in the water liquid combustion to keep it moist; During the wet and rainy season, including on the eve of rain, when the air is moist, the frog jumps out of the water.

1. Spider web: As the saying goes, "Spider web, long rain will be clear." "On rainy days, if the air pressure rises, the humidity decreases, insects fly high, and spiders open their webs to prey on insects, it indicates that the weather will be clearer. Conversely, the spider closes its web, indicating that it is about to rain.

2. The frog screams: When the air is dry, the frog's water evaporation accelerates, and it will naturally stay in the water to keep it moist; During the wet and rainy season, including on the eve of rain, when the air is moist, the frog jumps out of the water.

3. Bees do not leave the nest: Before the rain, the bee wings are easy to be stained with fine water droplets, gain weight, and it is difficult to fly, so they have to stay in the hive and do not come out.

4. Ants move: Before the rain, if the ant nest is too wet, the ants will no longer be able to stay here, so they have to move to a high and dry place, so there will be a situation where the ants move before the rain.

5. Swallows fly low: As we all know, swallows are small experts in predicting the weather, since ancient times, there is a folk proverb that "swallows fly low, heavy rain will come", the reason is that the air humidity will increase when it rains, and many small insects are not very low because of the vacancy nuclear gas humidity, and the swallows fly very low with the insects in order to catch the insects, so the swallows fly low means that it is about to rain.