Yellow rainstorm warning signal is an early warning signal made by the meteorological department through meteorological monitoring before the rainstorm. Yellow rainstorm warning signal is the second level of rainstorm warning signal, reminding people to avoid rainstorm and industrial and commercial enterprises to minimize the losses caused by rainstorm.
Division standard
Heavy rain is rain with high precipitation intensity. It is raining cats and dogs. Generally, it refers to the precipitation with hourly rainfall greater than16mm, or12h continuous rainfall greater than 30mm, or 24h continuous rainfall greater than 50mm.
According to China's meteorological regulations, rain with a precipitation of more than 50 mm in 24 hours is called "rainstorm". According to its precipitation intensity, it is divided into three grades, that is, the 24-hour precipitation of 50 ~ 99.9 mm is called "rainstorm", and the rainfall below 100 ~ 200 mm is called "heavy rainstorm".
Recently released "Guidelines for Advanced Warning of Typhoon and Rainstorm and School Defense in Different Periods";
Compared with the previous guidelines, the biggest change is to increase the school's defense guidelines when the orange rainstorm warning is issued during school hours. The warning of typhoon yellow or above will be issued at any time, and all primary and secondary schools and kindergartens in the city will be closed all day.
The guidelines for school defense in different time periods are basically the same as before. If the time period is from 8: 00 to 12 or 14: 30, the city's primary and secondary schools and kindergartens will continue to open except full-time classes, and at the same time, special personnel should be assigned to protect students and children entering the park. Unless circumstances permit or accompanied by a guardian, the school shall not allow students to leave school on their own.
Baidu Encyclopedia-Yellow rainstorm warning signal