What does the weather forecast mean by many horizontal lines?

The straight line is generally because there is an obvious front (the cold and warm peaks are obvious), while the curve is that the cold and warm peaks are not obvious.

1, weather forecast, is the application of atmospheric change law, according to the current and recent weather conditions, predict the weather conditions in a certain period in the future. It is based on the analysis of satellite cloud images and weather maps, combined with the comprehensive study of meteorological data, terrain and seasonal characteristics, and mass experience.

2. The satellite cloud image of China Central Meteorological Observatory was taken by Fengyun-1 meteorological satellite made in China. Using satellite cloud images for analysis can improve the accuracy of weather forecast.

3. Weather forecast is usually divided into three types: short-term weather forecast (2 ~ 3 days), medium-term weather forecast (4 ~ 9 days) and long-term weather forecast (10 ~ 15 days or more). CCTV mainly broadcasts short-term weather forecast every day.

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

After the weather forecast is made by the meteorological station, it will be announced to the public through various channels. The main ways to spread weather forecast are TV, newspaper, internet, short message, weather telephone, etc.

6. It will be the future trend to obtain weather forecast information through the Internet. Well-known weather forecast websites include Weather Online, China Weather Network and China Meteorological Observatory. The website of China Meteorological Observatory provides real-time weather forecast information and one-week weather forecast information of major cities and regions in China.