The weather in Xuchang in April

19 On February 28th, Henan Meteorological Bureau held a news briefing, and officially released the top ten weather and climate events in Henan in 20 19, including cold wave, heavy rainfall, heavy snowfall and high temperature, the most serious of which was Typhoon Wambia.

10. Strong winds hit in mid-March. On March 15- 16, strong winds and cold waves occurred in Henan Province. The maximum wind speed of each station is above 10 m/s, and it is more than 20 m/s along the Yellow River and most of the north. The local maximum instantaneous wind speed in Xinxiang reaches 30m/s; There are 24 stations that meet the cold wave standard, mainly distributed in the north of Huaihe River and the east of Beijing-Guangzhou line. Affected by this, 40 stations in Henan Province experienced late spring cold, and 42 stations experienced light to moderate late frost. Strong winds have caused different degrees of damage to crops and vegetable greenhouses, solar panels, transmission lines and other facilities in some areas.

9.65438+ A continuous low temperature process occurred in Henan Province. In the first ten days of February, 65438+February 4-10, and a continuous low temperature process occurred in Henan Province. This low temperature process has the characteristics of large cooling range, wide range, long duration, strong extremes and many rainy and snowy weather. The continuous cooling range of the lowest temperature is 8.6- 15.4℃. Except southwest Henan, the cooling range of 95 counties (cities) in Henan Province is above 10℃, especially along the Yellow River and most areas in northern and eastern Henan. Cooling is accompanied by rain and snow, which effectively improves soil moisture. The low temperature process effectively improved the air quality and lifted the heavy pollution weather process that lasted 10 days in the previous period. Low temperature can also reduce the overwintering base of various pests and diseases, and reduce the harm of pests and diseases in the coming spring, but it has certain adverse effects on protected agricultural production; This low temperature process makes people feel unusually cold, which has a certain impact on production and life.

8. In autumn and winter, a large-scale foggy weather occurred in Henan Province near165438+1October 24-65438+February 3, and the longest-lasting large-scale foggy weather occurred in Henan Province, among which165438+1October 27-29 The air pollution in the north and central and eastern parts of Henan Province is serious, with severe and above pollution days lasting for 7-9 days, with severe pollution 1-2 days. The air quality index of Zhengzhou, the capital of Henan Province, reached 420 165438 on October 28th, which was the highest among the cities under the jurisdiction of Henan Province 18.

7. In mid-May, heavy precipitation caused floods in many places. /kloc-on may 20, 2005, a large-scale heavy precipitation occurred in Henan province. The precipitation in southwest, east and north Henan is above 100 mm, and the average precipitation in Nanyang is 1 15.3 mm. There are 22 counties (cities) in Henan Province. In May, the daily precipitation in five counties (cities) of Fanxian, Xingyang, Neixiang, Zhenping and Nanyang exceeded the historical extreme value in the same period. Heavy rains and strong winds have caused waterlogging in many cities, seriously affecting urban traffic, and the maturing winter wheat is lodging.

Rare rainstorm occurred in many places in June and April. In the middle and late April, there were two rainstorm weather processes in Henan Province, namely, April113, with heavy rains in Shangqiu, Zhoukou, Luohe and Nanyang, and heavy rains in Nanyang. On April 20-22, heavy rains occurred in the north of the Yellow River and parts of Luoyang, Pingdingshan, Nanyang and Xinyang. The daily precipitation in Dengzhou, Ruyang and Linzhou stations in April all exceeded the historical extreme value in the same period since the station was established, especially in Linzhou, Taiqian, Ruyang, hua county, Yongcheng, Zhecheng County, Luohe and Dengzhou. During the 60 years from the establishment of the station to 20 19, the number of heavy rains in April was only 1-5.

In May and June, the precipitation in many places exceeded the maximum value in the same period in history. On June 18- 19, a large-scale precipitation process occurred along the Yellow River and in the south of Henan Province. The precipitation in Zhoukou-Zhumadian-Nanyang area exceeds 100 mm, and the daily precipitation at Xixia, Xichuan and Xiping stations in Nanyang exceeds the historical maximum in June. On June 25-26, a large-scale precipitation process occurred along the Yellow River and in northern Henan. The precipitation in most areas exceeds 50 mm, and some areas in northern Henan reach 100 mm. The daily precipitation in Qixian and Qinyang stations exceeds the historical extreme value in the same period in June. The precipitation in Jiaozuo City 1 hour reached 58 mm, causing urban waterlogging.

4. The duration of high temperature days in summer is long. The average number of high temperature days in Henan this summer is 25.7 days, which is 13.6 days more than normal, and the fifth highest in the same period since 196 1 year. On July1May-26, the strongest regional high temperature weather process occurred in Henan province this year. The average number of high temperature days in Henan Province is 9.5 days, and the number of high temperature days in 107 counties (cities) exceeds 5 days, of which 60 counties (cities) reach 10 ~ 12 days, mainly distributed in central and eastern Henan. The continuous high temperature days in 23 counties have reached or exceeded the historical extreme since the station was established. On July 25th, the coverage and intensity of high temperature was the largest. The average maximum temperature in Henan Province was 38.0℃, and the daily maximum temperature was above 35℃ at17 station (accounting for 96% of the total number of stations), and above 37℃ at 102 station (accounting for 84% of the total number of stations), with the highest in Jiaozuo being 40.

3. Frost and late spring cold caused freezing injury in early and late April. On April 3-7, a large-scale cold wave and windy weather occurred in Henan Province. On the 3rd, the temperature in Henan Province dropped rapidly from north to south. On the 4th, the highest temperature in the north-central part dropped by 20 ~ 28℃ compared with the 2nd, the highest temperature in most parts of Henan Province dropped below 10℃, and the lowest temperature along the Yellow River and its northern part dropped by 10 ~ 60℃. On the 3rd and 6th, there was a northerly wind of about 7-8 in Henan Province, and the gust in the north-central part was 9- 10. Mild late frost appeared at 23 stations in northern Henan and parts of central and western regions, and late spring cold appeared in Henan Province. Disasters have caused freezing damage to winter wheat, vegetables and fruit trees at heading stage, which has a great impact on crop growth.

2.65438+1The cold wave and snowstorm struck strongly in the first ten days of October, and the snowfall at several stations exceeded the extreme value of 65438+ 10. On the 3rd to 5th of October, the snowstorm weather of 10mm occurred in most parts of Henan Province, and the snowstorm of 20mm occurred in most parts of central and southern China, with the snowstorm of more than 30mm occurring in some counties and cities of Xinyang, Zhumadian and Nanyang. This snowfall has brought great influence and harm to transportation, residents' life, industrial production and facility agriculture, but it is very beneficial to purify air quality, reduce forest fire prevention grade, replenish reservoir water storage, increase soil moisture and reduce pests and diseases.

1. Typhoon "Wambia" hit eastern Henan, causing serious floods. On August 17- 19, due to the weakening of typhoon low pressure after the landing of Typhoon Wambia, the strongest precipitation process occurred in Henan Province in the flood season this year, with a large-scale rainstorm in the east of Beijing-Guangzhou line and heavy rains in Shangqiu and Zhoukou areas. * * * There are 8 national weather stations. Affected by this, serious urban and rural waterlogging occurred in Shangqiu and Zhoukou. The Shangqiu section of Beijing-Kowloon-Longhai Railway runs at a speed limit, power supply in some cities is temporarily interrupted, trains are delayed, and flights are delayed or cancelled.