Weather knowledge of weather forecast
"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. "Clear" means that the cloud cover accounts for10-30%; "Cloudy" means that the amount of clouds accounts for 40-70%; "Yin" means that the cloud cover accounts for 80- 100%.
Meteorological units have two standards for precipitation: 12 hours and 24 hours. /kloc-the standard of 0/2 hour precipitation level is: "light rain" refers to the precipitation of 0.6-5 mm; The "moderate rain" precipitation is 5.1-15 mm; "rainstorm"15.1-30 mm; "Rainstorm" is 30.1-70mm; The rainstorm is 70. 1-200mm. The standard of 24-hour precipitation level is: "light rain" precipitation means1-10mm; The precipitation of "moderate rain" means10.1-25mm; "Rainstorm" precipitation means 25. 1-50 mm; "Rainstorm" means 50.1-100 mm; "Rainstorm" is the precipitation of 100. 1-250 mm, and the forecast time does not exceed 12 hours, that is, the precipitation level standard of 12 hours. If it is predicted that there will be rain and snow during the day or night today, it means the snowfall within 12 hours. If it is predicted that there will be moderate to heavy snow from day to night today, it refers to the precipitation within 24 hours. In addition to 12.24 hour forecast, there are 48 hour forecast, 72 hour forecast and future weather analysis.
Because the weather bureau only provides three forecasts to TV stations, radio stations and major newspapers a day: morning, noon and evening. If you can't make a timely forecast of the sudden change of weather, how can you know the sudden change of weather in time? Since September 2009, China has opened a meteorological hotline 12 1. There is a new forecast every two hours on average, which is timely, accurate, convenient and fast. For example, Yangzhou's meteorological hotline 12 1 can answer 60 calls at the same time, and the phone bill is the same as that of ordinary local calls.