What time is the weather forecast during the day?
In terms of forecast period, the weather forecast refers to 8: 00 to 20: 00 during the day, 8: 00 at night, afternoon 14 to 16, and evening 16 to 20: 00. 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 according to 8: 00 and 20: 00, mainly because meteorological observation data, information and weather maps are collected from 8: 00 to 8: 00 and from 20: 00 to 20: 00 for forecasters to analyze the weather situation and make prediction conclusions.
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. There are always some errors in weather forecast because of the chaos of atmospheric process and the fact that science has not finally fully understood atmospheric process.
Introduction of common terms in weather forecast
There are many technical terms used in weather forecast, but there are actually specific provisions 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 and low clouds or 6- 10% high clouds. Yin refers to the weather phenomenon that the sky is dark and the clouds are densely covered, or even if there are clouds, the sky still feels dark, and occasionally the faint sunshine can be seen from the clouds.
Words like light rain, heavy rain and heavy rain, which we often say, are descriptions of rainfall levels and data for measuring precipitation in a region. Specifically, it refers to the depth of precipitation that falls from the sky to the ground and accumulates on the horizontal plane without evaporation, infiltration and loss. The depth of light rain is 10 mm, so we call it 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.