What kind of weather are the three winding weather symbols?

The three curves are weather symbols for blowing sand: blowing sand is caused by local or nearby dust being blown up by the wind.

Visibility dropped significantly, and the sky was cloudy and yellow when it appeared. In the north, it is easy to appear in spring. The wind is strong during blowing sand weather, which affects the visibility between 1 km and 10 km.

Sand and dust weather is divided into four categories: floating dust, blowing sand, sandstorms and strong sandstorms.

When sandstorms occur, it will cause a decrease in air quality, seriously affecting people's daily life and health, and will also have a certain impact on the ecological environment and some facility agriculture.

Therefore, temporary buildings and agricultural facilities should be reinforced to reduce or stop

outdoor aerial operations to avoid the hazards of sandstorms. At the same time, protection work must be done to avoid the harm caused by sandstorms to human health

and transportation.

Extended information:

The symbols commonly used in weather forecasts are: clear, cloudy, cloudy, frost, thunderstorm, rainfall, snowfall, fog, wind, cooling, sunshine, rain, sun, Moon, clouds and umbrella and snowman symbols.

1. Sunny: The cloud cover in the sky is less than 30%;

2. Sunny to cloudy: The cloud cover in the sky is less than 30% and changes to 30-80%;

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3. Cloudy: the sky has cloud cover accounting for 30-80%;

4. Overcast: the sky has cloud cover accounting for 90% or more;

5. Small (array) Rain: the daily rainfall is less than 10 mm;

6. Moderate rain: the daily rainfall is 10.1-24.9 mm;

7. Heavy rain: the daily rainfall is 25.0-49.9 mm;

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8. Heavy to heavy rain: the daily rainfall is more than 50.0 mm;

9. Thunderstorm: bursts of rainfall that come and go and are accompanied by lightning and thunder;

Baidu Encyclopedia-Sandstorm

China Meteorological Administration-Weather Symbols