A once-in-a-century rainstorm occurred in Zhengzhou, Henan Province. What historical records did Zhengzhou rainstorm break?

Zhengzhou Meteorological Bureau made a data collation and summary of this rainstorm. From 202 1 day 16 to 20 17, the hourly rainfall reached 20 1.9mm, from 20: 00 to 20: 00 on 19, the single-day rainfall was 552.5mm, and from 20: 00 to 20: 00 on June 7.

The average annual rainfall in Zhengzhou is 640.8mm, which is equivalent to the three days of the previous year. From the climatological point of view, by fitting the distribution curve, the probability and return period of hourly precipitation and daily precipitation are all once in a thousand years.

How hard is it raining? The dusty historical record for many years was published by Zhengzhou Meteorological Observatory. 19 From 8: 00 on July 20 to 8: 00 on July 20, Songshan was 364.6 mm and Xinmi was 254.9 mm, both of which suffered from torrential rain. The precipitation in both places broke the single-day rainfall record in the local observation history. The rainfall in a single day exceeds the historical extreme value (since the station was established), and the rainfall in an hour exceeds the daily historical extreme value, and the rainfall intensity is rare in history.

Throughout the world, an hour of rainfall of 201.9mm is not a small amount. According to the incomplete statistics of the World Meteorological Organization, the current record holder of the world's maximum rainfall in one hour is located in the United States. According to records,1On June 22nd, 947, Holt, Missouri, USA experienced a world-record rainstorm with a rainfall of 304.8mm in 42 minutes. According to the data, the precipitation in Zhengzhou has reached two-thirds of the world record at that time.

According to the Guide to Hydrological Practice published by the World Meteorological Organization 1994, Zhengzhou's rainfall of 20 1.9 mm can be ranked first in the world record of one-hour rainfall at that time.

Heavy rain in Henan province swept the screen, and several stations broke the single-day precipitation record in July. Zhengzhou even had a month of rain in an extraordinary year. Affected by heavy rain, waterlogging and floods occurred in many places in Henan, and street vehicles were swept away, which affected the concern of the whole country.

What measures has Henan meteorological department taken? In response to this process, Henan Meteorological Bureau conscientiously implemented the spirit of the provincial flood control work conference. According to the requirements of 1, meteorological departments at all levels acted quickly, made careful arrangements, implemented the wartime working mechanism, and implemented the 24-hour flood control duty system and the leadership shift system.

First, strengthen accurate monitoring, meteorological satellites, a new generation of Doppler weather radar 24-hour continuous observation, the province's ground, sounding encryption monitoring time;

Second, strengthen departmental linkage, roll out important meteorological information, meteorological information express and other decision-making service materials, carry out eight joint consultations, jointly issue meteorological risk early warning and forecast of mountain torrents geological disasters with the Water Resources Department and the Natural Resources Department, and provide inbound services for the provincial flood control office, the provincial emergency office, the provincial geological environment station and the provincial meteorological department, and deliver relevant information to the main responsible comrades of the party and government at the same level at the city and county levels at the first time;

Third, the whole network released early warning information, and through SMS, WeChat, Weibo, website and other channels, more than 1 100 were released to remind those responsible for more than 45 million people. Various new media in the meteorological department released more than 300 pieces of information such as forecast and early warning, rain conditions and popular science knowledge, covering more than 100 million people.