What are the weather signs of the three curves?

In the weather forecast, three curves are signs of breezy weather. It looks like a wave, with three lines. Roll up the top one and roll down the bottom two.

The main contents of weather forecast are the future rain, maximum and minimum temperature, wind direction and wind force and special disastrous weather in a region or city. As far as China is concerned, meteorological stations can accurately predict the location and intensity of natural disasters such as cold waves, typhoons and rainstorms, and can directly serve industrial and agricultural production and people's lives.

Weather forecast is based on meteorological observation data, applying the principles and methods of meteorology, dynamic meteorology and statistics to make a qualitative or quantitative forecast of the weather conditions in a certain area or a certain place in the future. It is an important goal of atmospheric science research and is of great significance to people's lives.