What time does the weather forecast refer to during the day?

The weather forecast refers to 8: 00 to 20: 00 during the day.

In terms of forecast period, the weather forecast refers to 8: 00-20:00 in the daytime, 8:00 in the evening, 14- 16 in the afternoon and 16-20:00 in the evening. Tonight to tomorrow means from 20: 00 pm to 20: 00 the next day. The meteorological department forecasts the weather in the next 24 hours at 8: 00 and 20: 00, mainly because meteorological observation data, information and weather charts that forecasters can use to analyze the weather situation and make prediction conclusions are collected at 8:00-8:00 and 20:00-20:00.

Weather forecast mainly uses collecting a large number of data, such as temperature, humidity, wind direction and speed, air pressure, etc. And then use the understanding of atmospheric processes to determine future air changes. Because of the chaos of the atmospheric process and the fact that science has not fully understood the atmospheric process, there will always be some errors in the weather forecast.

Introduction of common terms in weather forecast

There are many technical terms used in weather forecasting, but there are actually specific regulations in meteorology. For example, the most commonly used terms about the state of the sky include sunny, cloudy and Yin San. Sunny day refers to the phenomenon that there are no clouds or scattered clouds in the sky, but the amount of clouds is less than one tenth of the sky area. Cloudy refers to the sky conditions when there are 4-70% medium-low clouds or 6- 10% high clouds. Yin refers to the weather phenomenon that the sky is dark, the clouds are densely covered, or the sky is still dark despite the clouds, and occasionally the weak sunshine can be seen from the clouds.

Words like light rain, heavy rain and heavy rain we often say are descriptions of rainfall levels and data for measuring precipitation in a region. Specifically, it refers to the depth at which precipitation falls from the sky to the ground without evaporation, infiltration and loss on the horizontal plane. The depth of light rain is 10 mm, which we call light rain; /kloc-the depth from 0/0mm to 25mm is called moderate rain; 25 to 50 mm is called rainstorm; And more than 50 mm, we call it a rainstorm.