How to predict the future weather
Weather forecast is to predict the future weather by collecting, analyzing and interpreting a large number of meteorological data and phenomena. Satellites can provide the global weather conditions of the earth, and the changes of meteorological phenomena such as clouds, wind direction and wind speed can be observed through satellite images, so as to predict the future weather conditions.
Meteorological radar can observe meteorological phenomena, such as precipitation, clouds and wind speed, by emitting electromagnetic waves. By observing the electromagnetic wave signals returned by weather radar, we can judge the intensity, position and shape of meteorological phenomena, and then predict the future weather conditions. By measuring atmospheric pressure, temperature, humidity, wind speed, precipitation and other meteorological parameters, weather stations can monitor weather conditions in real time, thus predicting future weather conditions.
Weather common sense
When listening to the weather forecast, we often hear time terms such as "today's day" and "tonight", and meteorological terms such as "cloudy", "cloudy" and "sunny". "Today's daytime" refers to 12 hours from 8 am to 20 pm; "Tonight" means 12 hours from 20: 00 to 8: 00 the next morning. "Sunny" means cloud cover 10-30%, "cloudy" means cloud cover 40-70%, and "cloudy" means cloud cover 80- 100%.
Meteorological units have two standards for precipitation: 12 hours and 24 hours. According to the precipitation standard of 12 hour, "light rain" refers to precipitation of 0.6-5mm, "moderate rain" refers to precipitation of 5.1-kloc-0/5.1-30 mm, and "heavy rain" refers to1-30 mm.
According to the standard of 24-hour precipitation level, "light rain" precipitation refers to1-10mm, "moderate rain" precipitation refers to10.1-25mm, "heavy rain" precipitation refers to 25.1-50mm, ".