Henan has experienced the top ten climate events: cold wave, typhoon, heavy rainfall and snow.
On December 28, the Henan Meteorological Bureau held a press briefing to officially release the top ten weather and climate events in Henan in 2019. Cold waves, heavy rainfall, heavy snowfall, and high temperatures have all been experienced. The most serious one is the "warmth Typhoon Biya. 10. Encountered strong winds in mid-March
From March 15th to 16th, strong winds and cold wave weather occurred in Henan Province. The maximum wind speed at each station was above 10 meters/second, and most of the wind speeds along the Yellow River and north exceeded 20 meters/second, and the local maximum instantaneous wind speed in Xinxiang reached 30 meters/second; 24 stations reached the cold wave standard, mainly located in the area north of the Huaihe River and east of the Beijing-Guangzhou Line. Affected by this, 40 stations in Henan Province experienced late spring cold, and 42 stations experienced mild to moderate late frost. Strong winds caused varying degrees of damage to crops and vegetable greenhouses, solar power panels, transmission lines and other facilities in some areas. 9. A sustained low temperature process occurred in Henan Province in early December
From December 4 to 10, a sustained low temperature process occurred in Henan Province. This low-temperature process has the characteristics of large cooling amplitude, wide range, long duration, strong extremeness, and accompanying rain and snow. The minimum temperature has continuously dropped between 8.6-15.4℃. Except for southwestern Henan, the temperature drop in 95 counties (cities) in Henan Province has been above 10℃, especially in most areas along the Yellow River and north and in the eastern part of eastern Henan. Above 12℃. Cooling accompanied by rain and snow can effectively improve soil moisture. This low temperature process has effectively improved the air quality and eliminated the heavy pollution weather process that lasted for 10 days in the early stage. The low temperature can also reduce the overwintering base of various diseases and insect pests and reduce the harm of pests and diseases in the coming spring, but it will have certain disadvantages for facility agricultural production. Impact: This low temperature process makes the human body feel abnormally cold, which has a certain impact on production and life. 8. Large-scale haze weather occurred in Henan Province for nearly 10 days in autumn and winter
From November 24 to December 3, Henan Province experienced the longest-lasting large-scale severe haze weather in the year, with 11 From March 27th to 29th, heavy fog occurred in the area east of the Beijing-Guangzhou line in Henan Province. Most of the six regions of Shangqiu, Zhoukou, Kaifeng, Luohe, Xuchang, and Zhumadian experienced strong dense fog with visibility less than 200 meters, and visibility less than 50 meters in some areas. extremely dense fog. Air pollution is serious in the northern and central-eastern regions of Henan Province. The number of days with severe and above pollution levels lasts for 7 to 9 days, and there are 1 to 2 days of severe pollution. On November 28, the air quality index in Zhengzhou, the provincial capital, was as high as 420, which was the highest level during this severe period. The pollution process is the highest among the 18 provincial and municipalities in Henan Province. 7. Heavy precipitation in mid-May caused floods in many places
From May 15 to 20, a large-scale heavy precipitation process occurred in Henan Province, with local precipitation amounts of 100 in most of southwestern Henan, eastern southern Henan, and northern Henan. millimeters, the average precipitation in Nanyang City reached 115.3 millimeters, and 22 counties (cities) in Henan Province experienced heavy rains. Two counties (cities), Huaibin and Nanyang, experienced heavy rains; Fanxian, Xingyang, Neixiang, Zhenping, The daily precipitation in 5 counties (cities) in Nanyang exceeded the historical extreme value for the same period in May. Heavy rains and strong winds have caused urban waterlogging in many places, severely affecting traffic in the city, and causing winter wheat that is about to mature to lie down. ? 6. Rare heavy rains occurred in many places in April
Henan Province experienced two heavy rains in mid-to-late April, one from April 11 to 13, with heavy rains occurring in parts of Shangqiu, Zhoukou, Luohe and Nanyang. , heavy rainstorms occurred locally in Nanyang; from April 20 to 22, heavy to heavy rains occurred in parts of the north of the Yellow River and Luoyang, Pingdingshan, Nanyang, and Xinyang. The daily precipitation at Dengzhou, Ruyang, and Linzhou stations exceeded the historical extreme value for the same period in April since the establishment of the station, especially at 8 stations including Linzhou, Taiqian, Ruyang, Huaxian, Yongcheng, Zhecheng, Luohe, and Dengzhou. Counties (cities), in the 60 years since the establishment of the station to 2019, the number of heavy rains in April has only been 1-5 times, so it is relatively rare for these 8 counties (cities) to have heavy rains in April this year. 5. Precipitation in many places in June exceeded the historical extreme value for the same period
From June 18 to 19, a large-scale precipitation process occurred in the areas along the Yellow River and south of Henan Province. The precipitation in the Zhoukou-Zhumadian-Nanyang area was 100 mm. Above, some areas exceeded 150 millimeters, and the daily precipitation at Nanyang Xixia, Xichuan and Zhumadian Xiping stations exceeded the historical extreme value for the same period in June. From June 25th to 26th, a large-scale precipitation process occurred in the areas along the Yellow River and north of Henan Province. The precipitation exceeded 50 mm in most areas, and reached more than 100 mm in parts of northern Henan. The daily precipitation at Qixian and Qinyang stations exceeded The historical extreme value for the same period in June. The precipitation in urban Jiaozuo reached 58 millimeters in one hour, causing urban flooding. 4. The number of high-temperature days in summer is high and lasts for a long time
The average number of high-temperature days in Henan Province this summer was 25.7 days, 13.6 days more than the same period in normal years, and the fifth most in the same period since 1961. From July 15th to 26th, Henan Province experienced the strongest regional high temperature weather process this year. The average number of high temperature days in Henan Province was 9.5. There were 107 counties (cities) with more than 5 high temperature days, of which 60 counties (cities) had 10~ 12 days, mainly distributed in parts of central and eastern parts of Henan, northern and southern Henan; 23 counties had consecutive high temperature days reaching or exceeding the historical extreme values since the establishment of the station.
The high temperature coverage and intensity were the largest on July 25. The average maximum temperature in Henan Province reached 38.0°C. There were 117 stations with daily maximum temperatures above 35°C (accounting for 96% of the total measuring stations), and 102 stations with temperatures above 37°C. (accounting for 84% of the total number of measuring stations), the highest temperature in Jiaozuo was 40.2℃. 3. Late frost and late spring cold in early April caused freezing damage
From April 3 to 7, Henan Province experienced a wide range of cold waves and strong winds. From the 3rd, the temperature in Henan Province dropped rapidly from north to south. The maximum temperature in central China dropped by 20-28℃ compared with the 2nd. The maximum temperature dropped below 10℃ in most parts of Henan Province. The minimum temperature dropped by 10-17℃ along the Yellow River and to the north. In other areas, it dropped by 6-10℃. ** *A cold wave occurred in 52 stations; on the 3rd and 6th, northerly winds of magnitude 7 to 8 occurred in Henan Province, and gusts of magnitude 9 to 10 occurred in the north and central part. Mild late frost occurred in 23 stations in parts of northern Henan and central and western regions, and late spring cold occurred in Henan Province. This disaster caused winter wheat, vegetables, fruit trees, etc. in the heading period to suffer freezing damage, which had a great impact on the growth of crops. 2. A cold wave and heavy snowstorm hit in early January, and the snowfall in many stations exceeded the extreme value
From January 3 to 5, most areas of Henan Province experienced blizzard weather of more than 10 mm, and most areas in central and southern China experienced blizzard conditions of 20 mm. Heavy snowfall of more than 30 mm occurred in some counties and cities in Xinyang, Zhumadian and Nanyang. The daily snowfall of 12 stations in Henan Province exceeded the historical extreme value for the same period in January since the establishment of the station. The snow depth in southern Henan is mostly more than 20 centimeters, and the maximum depth in Jigong Mountain is 41 centimeters. This snowfall has had a great impact and harm on transportation, residents' lives, industrial production, facility agriculture, etc., but it is very beneficial to purifying air quality, reducing forest fire protection levels, replenishing reservoir water storage, increasing soil moisture, and reducing pests and diseases. . 1. Typhoon "Wumbia" hit eastern Henan, causing serious floods
From August 17 to 19, affected by the weakened typhoon low pressure after the landing of Typhoon "Wumbia", Henan Province experienced the worst flood season this year. During the heavy rainfall process, large-scale heavy rains occurred in the areas east of the Beijing-Guangzhou line, and extremely heavy rains occurred in the Shangqiu and Zhoukou areas. The daily precipitation of 8 national weather stations exceeded the historical extreme value since the establishment of the station. Among them, the 355.2 mm at the Xiayi station exceeded the historical extreme. Twice the extreme value, 363.6 mm at Shangqiu station is close to the annual average of total precipitation in the flood season. Affected by this, severe urban and rural waterlogging occurred in Shangqiu, Zhoukou and other places. The Beijing-Kowloon and Longhai railways operated at limited speeds in Shangqiu. In some cities, power was briefly interrupted, trains were delayed, and flights were delayed or cancelled.