What does the rainstorm black sign mean

The first: light rain turns to moderate rain.

The second: heavy rain.

Weather 1, weather phenomenon symbols.

When a weather observer observes a weather phenomenon, the corresponding symbol should be recorded in the "Weather Phenomenon" column of the observation book on that day, except for a few phenomena, and its start and end times should be recorded at the same time. On the basis of these symbols, combined with the intensity, coexistence and certain characteristics of weather phenomena, a set of symbols that can be filled in on the weather map is called mapping symbols.

2. Weather graphic symbols.

In order to facilitate the public's understanding and identification, a set of image graphics representing weather phenomena has been developed for television or other public ** communication.

It means moderate rain and heavy rain.

已 yǐ

Stop, that's it: learning is not a last resort. Dead and gone.

Indicates the past: already. That's it. Past. Has.

Later, after some time, it was gone.

Too, too: Not too much.

Ancient with "to". Not.

torrential rain (English name torrential rain; rainstorm;storm refers to rain with a high intensity of precipitation, often formed in cumulonimbus clouds.

According to China's meteorological regulations, heavy rainfall with more than 50 mm of precipitation in 24 hours is called "heavy rain". According to the intensity of precipitation, it is divided into three levels, that is, the 24-hour precipitation is called "heavy rain" in millimeters, and the "heavy rain" between millimeters is called "extremely heavy rain".

However, due to the different precipitation and topographic characteristics in different places, the standards of heavy rain and flooding are also different in different places. In business practice, heavy rainfall can be divided into local rainstorms, regional rainstorms, large-scale rainstorms, and extra-large rainstorms according to the size of the occurrence and impact range.

Heavy rain formed. The process of rainstorm formation is quite complex, generally from the macroscopic physical conditions, the main physical conditions for the production of rainstorm are sufficient water vapor, strong and persistent upward movement of air current, and instability of atmospheric structure. Large, medium and small weather systems at various scales and a favorable combination of underlying surfaces, especially topography, can produce large rainstorms.

The weather systems that cause widespread heavy rainfall in China mainly include fronts, cyclones, shear lines, low vortices, troughs, typhoons, easterly waves, and intertropical convergence zones. In addition, localized thermal thundershowers in arid and semi-arid areas can also cause short-lasting, small-scale heavy rainstorms. Heavy rains often fall from cumulonimbus clouds.

The condition for the formation of cumulonimbus clouds is that the atmosphere must contain sufficient water vapor, and there is a strong upward movement, which transports the water vapor rapidly upward, and the water droplets in the cloud are affected by the upward movement and continue to increase, until the updraft can no longer support it, and then it will fall sharply to the ground.

Rainstorm Explained:

According to China's meteorological regulations, heavy rainfall with 50 mm or more of precipitation in 24 hours is called "heavy rain". Due to the different precipitation and topographic characteristics in different places, the standards of heavy rain and flooding are also different in different places. Heavy rainfall is a disastrous weather that often causes flooding and severe soil erosion, resulting in major economic losses such as engineering failures, embankment failures and crop flooding.

This is the floating and sinking weather, the floating dust weather is the lowest intensity of the sandstorm, is due to the distant generation and transmission of sandstorms or local sand blowing weather, when the intensity is weakened, the coarse particles in the dust gravity settle, the fine particles are continued to be transported and floated in the air and the formation of weather phenomena. When the wind speed continues to decrease, the suspended dust particles will settle to the ground, so it is commonly known as "falling yellow sand". In dusty weather, distant objects are earthy yellow, and the sun is pale or yellowish; The wind speed is not very high, level 4 or lower; Visibility is less than 10 km and more than 1 km.

Floating dust and dust fall deteriorate the surrounding environment and have an important impact on human health, especially the respiratory system.

There are 4 possible cases:1sunny to heavy rain; 2.

sunny to heavy to heavy rain; 3.Heavy to heavy rain on sunny days; 4.Rainstorm on a sunny day!

Because there are no more than two meteorological symbols in the weather forecast; Example: Moderate rain symbols increase rain symbols, some are forecast for moderate to heavy rain, and sometimes forecast for moderate to heavy rain. If you usually watch the weather forecast and pay attention to the weather symbols, you will understand; Anyway, it's just that there are different results in different situations!

Thunderstorm weather signs, the landlord should pay attention to bring an umbrella when going out.

Thundershowers are weather phenomena that manifest themselves as large-scale cloud movements, much more intense than showers, accompanied by electrical discharges, and are common in summer. Below is the weather icon I hope will be helpful to the landlord.

Thunderstorms today.

Thundershowers tomorrow.

Thundershowers the day after tomorrow.

Heavy rain(torrential rain) is rain with a high intensity of precipitation. The rain was pouring down. Generally, it refers to precipitation of more than 16 mm per hour, or more than 30 mm of rainfall for 12 consecutive hours, or more than 50 mm of rainfall for 24 consecutive hours.

According to Chinese meteorological regulations, rain with 50 mm or more of precipitation in 24 hours is called "heavy rain". According to the intensity of precipitation, it is divided into three levels, that is, the 24-hour precipitation is 50 mm, which is called "heavy rain"; Below 100 250 mm is considered a "heavy rain"; Temperatures above 250 mm are called "heavy rainfall".

There is no such thing as "3-4 levels of heavy rain" in meteorology.

Left turns are prohibited during the specified periods, and left turns can be made when the left turn lights are on during the rest of the periods.