Why Henan has become the center of rainstorms
Why Henan has become the center of rainstorms, August 21 to 24, China from west to east will have a heavy rainfall weather process, affecting nine provinces and cities, Sichuan Henan rainfall or the strongest. This rainfall process has a very typical feature is not only rain, wind is also particularly strong.
Why Henan has become the center of rainstorms again1
Experts are alert to the impact of strong winds and rainstorms superimposed
According to the Central Weather Bureau forecast, from August 21 to 24, from the west to the east of our country there will be a heavy rainfall weather process. Among them, just experienced "7-20" heavy rain in Henan, after a month, will again encounter heavy rainfall.
The heavy rainfall and "7-20" compared to the heavy rain, how strong? The risk of disaster is big? China Meteorological News reporter invited the chief forecaster of the Central Weather Bureau, Mr. Zhang Tao, to make an authoritative interpretation.
Impact on 9 provinces and cities, Sichuan and Henan, the strongest rainfall
Zhang Tao said that the heavy rainfall has a wide range of impact, local rainfall strong, the system is moving fast and so on, and at the same time, in the Yellow River and Huaihuai region accompanied by gusty winds. Because this process moves faster, so the cumulative rainfall will not be particularly extreme, but the short-term rain intensity is relatively large, need to pay attention to; this rainfall superimposed on the pre-existing disaster areas in Henan, the impact is very large, reservoirs, lakes, rivers need to be on guard.
Zhang Tao explained, from the system configuration, the heavy rainfall process is very typical of the monsoon rainfall, subtropical high pressure westward, so that the warm and humid air from the Indian Ocean, South China Sea, the western Pacific Ocean smoothly along the western edge of the subtropical high pressure northward, and from the north of the cold air into a standoff situation, resulting in widespread rainfall.
Strong rainfall affects a wide range. Sichuan, Chongqing, Shaanxi, Shanxi, Henan, Hubei, Anhui, Shandong, Jiangsu and other 9 provinces (municipalities) are in the heavy rainfall in the fall area, the overall to medium to heavy rain mainly, but in a few more centralized places, there will be heavy to heavy rain. Among them, to the Sichuan Basin and Henan's rainfall is the strongest, the local rainfall can reach 250 to 400 millimeters, which has been the level of extraordinarily heavy rainfall.
Henan need to be vigilant about the superimposed impacts caused by the disaster
This process, Henan is again the center of the storm. After a month, we can't help but think of last month's "7-20" Henan rainstorm, the two processes in the intensity, what are the similarities and differences in causes?
Zhang Tao said, Henan this rainstorm process and "7-20" is different. The rainfall process is mobile, will not reproduce the previous rainfall "hovering", so the cumulative rainfall will not be particularly extreme. Further, this process is the subtropical high pressure west to guide the combination of airflow and water vapor formation of heavy rain, is a typical flood season rainstorm configuration; in contrast, "7-20" process typhoon and the subtropical high pressure in the sea, far away, belong to the indirect impact, coupled with the water vapor and topography, etc. to produce" chemical reaction", not only this year's rainfall, the rainfall is mobile, will not repeat the previous rainfall "hovering", so the cumulative amount of rain will not be particularly extreme. Chemical reaction", not only unique to this summer and history of rare, ultimately leading to that rare record-breaking rainstorms.
However, Zhang Tao special tips, this time the cumulative rainfall, although not particularly extreme, but still may bring a very large, very unfavorable impact on Henan. Because a month ago, extreme rainstorms to Henan brought the impact of the disaster has not yet completely past, the rainfall area and the previous rainstorms in the affected areas overlap, therefore, especially recommended that the local flood control and emergency disposal preparations in advance.
Henan, Shandong and other places also need to guard against gusty winds
Zhang Tao said that the rainfall process has a very typical feature is not only rain, the wind is also particularly strong. With the summer and fall seasonal transition, the north of the cold air is gradually active, and from the south of the warm and humid airflow collision process "rub" out three cyclones, fell in the southwest to the northeast on a line, respectively, located in the northeast, the eastern part of the Northwest region to Henan, Shandong, and the Sichuan Basin. These three regions are also this round of rainfall concentration area.
Especially in the eastern part of the Northwest Territories to Henan, Shandong cyclone along Henan, Shandong, moving eastward with strong winds, strong winds and rain, more destructive. From a preventive point of view, this cyclone through the areas along the process can be treated as a "land-based tropical cyclone", to a high standard of prevention. According to the forecast, 22 to 24 days in the east-central part of Henan, Shandong, and the Yellow Sea waters will have 4 to 6, gusts of 7 to 9 rotating winds, local gusts of up to 8 to 11 levels.
Therefore, Henan, Shandong and other places need to do a good job of outdoor billboards, temporary structures to strengthen, reduce or avoid work at height; Yellow Sea waters need to guard against gusty winds on passing ships, the adverse impact of maritime operations.
process is still uncertain, need to pay attention to the strong convective weather
Zhang Tao prompted the process of cold and warm air convergence "rub" out of the three cyclones, can now foresee the three rainfall centers in the approximate location and intensity. But we also need to pay attention to is, may be hidden in the three rainfall center, the scale is much smaller strong convective weather process. These strong convective processes, like "small bubbles of water after boiling", are the real determinants of the extremes of rainfall at a single point in the `small and medium scale systems.
From the laws of nature, the smaller the scale, the greater the uncertainty of the existence of the predictability of the lower, so, around the dynamic attention to the local meteorological department rolling update of the short-term proximity of the forecast warning information.
Why Henan has become the center of heavy rainfall 2
August 21 to 24, China from west to east will have a heavy rainfall weather process, affecting nine provinces and cities, Sichuan Henan rainfall or the strongest.
Experiencing the "720" rainstorm disaster just a month, still in the reconstruction of Zhengzhou, will again encounter heavy rain or heavy rain.
On the evening of August 18, Henan Province Flood Control and Drought Relief Command Office issued an emergency notice, requiring all relevant units to do a good job in the upcoming three rounds of heavy rainfall process prevention and response work.
According to the Henan provincial meteorological department forecast, August 22, north of the Yellow River and Sanmenxia, Luoyang, Zhengzhou, Kaifeng, Xuchang, Shangqiu and other places in some counties and cities have torrential rain or heavy rainfall, the localities very heavy rainfall, precipitation in most areas of 70 ~ 100 mm, some counties and cities, 150 ~ 180 mm, locally up to 200 ~ 300 mm, the maximum hourly rainfall of 70 ~ 90 mm.
20, sunny, surging news field visit Zhengzhou urban tunnels, subway entrances, interviews with neighborhoods, hospitals, etc., found that all take flood control measures or preparation. Although the forecast from the rainstorm is not "720" serious, but many people have palpitations. Many people said that they had previously purchased a safety hammer, some people even bought a kayak. the evening of August 18, there are even people will drive on the viaduct. Some Henan media said, "I heard that the rainstorm is coming, Zhengzhou people's reaction is too hard!"
The subway entrance has been installed water blocking boards, the tunnel entrance are equipped with barricades
August 20 at noon, Zhengzhou weather is sunny, the day's maximum temperature of 32 degrees Celsius.
Surfing news randomly viewed Zhengzhou subway line 3, line 5, a number of sites, see the site of the entrance and exit are closed iron gate. After the hollowed out iron grille door, installed with fifty to sixty centimeters high waterproof aluminum baffle, baffle also piled up after the flood control sandbags.
The waterproof baffle installed at the entrance of the subway This picture is surging news reporter Duan Yanchao Figure
20 14:00, Line 3 People's Park Station staff told surging news, the site because there are three underground layers, so before the heavier damage, the recent construction, so there are entrances and exits are open. 18 August received rainfall warning, the subway side of the measure , installing waterproof aluminum baffles and stacking sandbags at all site entrances and exits. Its introduction, their own line 3, the two days have been flood control drills. Although the subway has not resumed operations, the drill still includes pacifying and evacuating passengers, preventing all entrances and exits into the water, protection facilities. And, at 23:00 on the 20th, all the staff of Line 3 stations will collectively carry out emergency flood control drills.
The staff introduced the other subway lines, she is not clear, should be similar, because the group has flood control requirements.
According to the official website of Zhengzhou Metro Group Co., Ltd. August 19 news, "720" heavy rainstorm disaster led to the Zhengzhou Metro full line network out of service, after all efforts to repair, Zhengzhou Metro Line 4, Line 5, Line 2, Phase II has been realized idle operation, due to epidemic prevention and control of the suspension of idle operation of the 1 line, Line 2 Phase I and Suburban Railway Phase I resumed idle operation. and suburban railroad a resumption of unloaded operation. Zhengzhou Metro is fully cooperating with the safety assessment, and strive to realize passenger operation as soon as possible.
In the city of Zhengzhou, surging news reporter randomly observed, after each tunnel entrance and exit, are put in an emergency barricade, mostly 50-60 centimeters high telescopic barricade. In the "720" heavy rainstorm disaster caused six deaths, the attention of the Jingguang Road Tunnel (including the South Road Tunnel, Middle Road Tunnel, North Road Tunnel), but also stand by. The surging news reporter saw, each tunnel entrance and exit, not only with a meter high yellow iron barricades, but also with road cones, red plastic waterproof boards, warning lights.
Jingguang North Road tunnel entrance ready barricades and waterproof baffle
In this regard, Zhengzhou City Tunnel Integrated Management and Maintenance Center staff introduced the center in cooperation with the traffic police department in its management of the eight tunnels (including the Jingguang Road Tunnel) entrance and exit added to the line break facilities. The retrofitting of disconnection facilities, mainly for the traffic police traffic control barricades, and in the rainfall arrangements for manned, once the tunnel water is serious, the road will be promptly disconnected.
Surfing news also noted that the road has construction pits, are erected warning signs, the direction of incoming traffic also set up warning lights, road cones.
The warning signs set up on the road
Hospitals, schools and neighborhoods have to take measures, and some people even bought a kayak
Surfing news along the nautical road (Zijingshan Road to Jingguang Road section), to see a lot of businesses on both sides of the road are piled up in front of the flood control sandbags. Nautical Road and Zijingshan Road intersection near a gas station staff told surging news, gas station terrain is relatively high, "720" heavy rainstorms, water almost into the business hall. In the face of the imminent rainstorm, Zhengzhou company has issued a notice, in addition to the preparation of flood control materials, 20 morning gas station also carried out flood control drills.
In the Jingguang Road North Tunnel at the north exit of the Erqi District Jingguang Road District, the west door (main door) has been locked, the doorway piled up a meter high flood control sandbags. Doorman told the surging news, because the district terrain west high east low, "720" heavy rainstorms, the influx of water into the school from the east door flowed out, so the school water is not deep, only one or two centimeters. This time, I heard that the education department issued a flood control requirements, the school has long been prepared for flood control materials, such as rainfall, school leaders will be on duty, but also do have a plan.
The elementary school has piled up sandbags at the entrance
In the "720" rainstorm, Zhengzhou city, a number of hospitals were seriously affected. At present, Zhengzhou is in a critical period of anti-epidemic. As the new Crown pneumonia sentinel hospital in Zhengzhou City, the first people's hospital harbor hospital relevant person in charge of the hospital is located in a higher position, before the heavy rainstorm in the ground basically no water. However, the upcoming rainstorm, the hospital has made sufficient flood control preparations and plans. Its introduction, the hospital has two CT car outdoors, has made adequate preparations for rain. More importantly, as a designated hospital, to strictly prevent the spread of pollution, etc., has focused on strengthening the medical waste storage and treatment points of flood control preparations to speed up the turnover and clearance. In addition, the protection of sewage treatment facilities has been strengthened to prevent backflow and backward discharge.
Citizen Mr. Zhang lives in the pipe city in a district, "720" rainstorms, the district did not water, although the district outside the road surface water than the district underground garage mouth higher than 30 centimeters, the good in the property measures in a timely manner, the temporary garage mouth with a wooden board to block the back of the heap of sandbags, sent 24-hour watch, so the community! No vehicles affected. In the face of this rainstorm, the community property has been a professional stall water board reinforced on both sides of the garage mouth, once the rainstorm comes, when needed, close and lock the operation in just 10 seconds, and then next to the sandbags placed behind the water board, sealing the gap can be.
"Charge the performance of the last flood property, the recent should pay the property fee, I immediately paid." Mr. Zhang said with a smile.
A number of interviewed Zhengzhou car owners said, "720" after the rainstorm, they have bought a safety hammer, some also bought a life jacket.
Mr. Cao even bought an inflatable kayak and three sets of life jackets. Mr. Cao lives in the resettlement housing district, in the "720" rainstorm, two underground garages were filled, many vehicles were flooded, water in the area have been over the waist. Until now, the neighborhood is still temporary electricity, underground garage is still under repair, owners of vehicles are parked outside. This time, Mr. Cao is more worried, he specifically called the property, and got a reply that has been prepared for flood control, but he always felt uneasy. He repeatedly asked where the sandbags, the property said in the warehouse put, he urged the earliest possible pile in the door.
Surfing news passing through the Jingguang Road viaduct, a certain under the bridge, see seven or eight cars parked in the emergency lane of the lower bridge channel, there are BMW and Porsche, the car is unoccupied. According to Henan media reports, see the rainstorm is coming again, some people say "panic", there are neighborhoods underground garage has been empty, owners have parked their cars to the high ground, Longzihu Longmenqiao side of the road has been parked full of private cars. Insurance companies have reminded car owners to pay attention to the news. There are neighborhoods early ready sandbags and pumps, flood control drills in advance. There are old and dangerous neighborhoods, the residents and merchants have been informed in advance to evacuate to a safe place.
Parked in the elevated underpass private cars.
However, some people expressed calm, "As long as there is a sense of precaution and measures, the rainstorm is nothing to be afraid of."