China News Service, April 29, 29th, China Meteorological Administration held a press conference. Wang Zhihua, head of the Emergency Disaster Mitigation and Public Service Department of the China Meteorological Administration, said that during the "May Day", the temperature in most parts of the country was 1 to 3 degrees Celsius higher than normal. Among them, the temperature in some parts of eastern Northwest China, North China, Huanghuai and other places was higher than 3 ～ 5 ℃, on May 1-2, the maximum daily temperature in southern North China, western Huanghuai, central and western Inner Mongolia, and Shaanxi Guanzhong is 32 ～ 34 ℃, local 35 ～ 37 ℃, approaching or breaking through the historical extreme value.
The cold air in the middle and late holidays will affect the middle and lower reaches of the Yangtze River and the area north of it. On 3-5 days, the temperature in eastern Northwest China, North China, Huanghuai, Jianghan, Jianghuai, and other places will drop by 4 to 6 ° C, and locally by 8 to 10 ° C.
Rainy weather in Jiangnan, northern South China and Guizhou. On May 1-2, most of Jiangnan, northern South China, and Guizhou suffered from moderate to moderate rain, and localities were severely heavy. Around 3 days, some areas in North China, Huanghuai and Jianghan had scattered small to moderate rain or thunderstorms.
Around the 5th, there was a large-scale rainfall process in the eastern part of the northwestern region, the western part of the northern part of China, and most of the southern part, generally ranging from small to moderate rains. Among them, the southern part of the southern part of southern China, Guizhou, and other parts of the country experienced heavy to heavy rains and heavy rains in some areas. The roads in Hunan, Jiangxi, Fujian, Beijing-Guangzhou, Beijing-Hong Kong-Macau, Jiguang, Fuyin, Quannan, Beijing-Taiwan and other high-speed roads are slippery and stagnant, and the risk of road congestion is greater.
From May 7th to 9th, there will be a moderate to heavy rain in the central and eastern part, local heavy rain or heavy rain precipitation process.
Early holidays (May 1 to 3), northern Beijing, northern and western Hebei, eastern Shanxi, northeastern Inner Mongolia, northwestern Heilongjiang, southwest and eastern Liaoning, Shandong Peninsula, northern and central Shaanxi, southeastern Gansu and other places In some areas, the forest fire risk meteorological grade is relatively high. Among them, some areas in northern Beijing, northern Hebei, eastern Shanxi, southeastern Liaoning, northern Shandong peninsula and other places have high forest fire hazard meteorological grades. In the later part of the holiday (4th to 5th), due to precipitation, the forest fire risk meteorological grades in northern Beijing, northern Hebei, southwestern Liaoning, and eastern China will be reduced, and the forest fire danger meteorological grades in the other regions mentioned above will be maintained. During the holiday period (1st to 5th), some areas of Hulunbeier, Inner Mongolia have higher grassland fire hazard meteorological grades.
In response to the weather conditions during the May Day holiday, Wang Zhihua said that the meteorological department has the following concerns and suggestions: During the May Day this year, the northern part was sunny and hot in the early period, and there was cold air activity in the middle and late period; the southern part was rainy and rainy. Northwest, North China, Huanghuai and other places have large temperature changes, and it is necessary to prevent colds and other diseases. Beijing, Hebei, Shanxi, Liaoning, Shandong and other places have high forest fire danger meteorological grades, and eastern Inner Mongolia grassland fire danger meteorological grades are high. It is necessary to strictly control field fires and strengthen fire source point monitoring to prevent possible fires. Guizhou, Hunan, Jiangxi, Zhejiang, Fujian, Guangxi, Guangdong and other places need to guard against the adverse effects of local heavy rainfall and strong convective weather on traffic travel. In the early holidays, there are heavy fogs in the Yellow Sea and the coast, and maritime and island tourism must be protected from the adverse effects of low visibility.
Wang Zhihua said that in May, the temperature in most agricultural areas of the country is expected to be higher, with more precipitation in the south of the northeast and less precipitation in the north, which is beneficial to the increase of soil moisture in the lack of moisture in the south and the dispersion of soil in the wet area in the north. Overall favorable. Precipitation in most northern winter wheat areas is more or close to normal, and the soil moisture is better, which is conducive to the formation of winter wheat production; however, the temperature in northern China and northern Huanghuai is higher, and the rainfall is less, and some areas may have soil moisture and dry and hot wind weather. More precipitation in the middle and lower reaches of the Yangtze River is not conducive to the maturity of winter wheat and rapeseed, and it is also prone to flooding in farmland. The southwestern region has little temperature and high rainfall, and some areas are prone to drought, which is unfavorable for the growth of one-season rice, flue-cured tobacco transplantation and spring-sown crops.
The spring sowing area in the northern part of the country took advantage of the moisture. Northeast, northwest, north China and other areas that have not been planted in the spring should pay attention to sowing and sowing to ensure the successful completion of spring sowing. The areas where seedlings have emerged should be checked and replanted in a timely manner, strengthen field management, and ensure that the seedlings are strong.
Northern winter wheat areas should strengthen the management of water and fertilizer in the later stage of wheat. All regions need to reasonably irrigate and fertilize according to seedling and moisture conditions, increase seed setting rate and grain weight, and promote the formation of yield; and pay attention to prevent the strong weather, strong winds and other adverse weather caused by wheat lodging, and Huanghuai region pay attention to prevent dry and hot wind damage.
The southern agricultural areas should do well in the field management of summer harvest and spring sowing crops. Jianghuai, Jianghan, Jiangnan and other places need to harvest and dry mature winter wheat and rape in a timely manner, to prevent the adverse effects caused by excessive precipitation, and pay attention to timely clearing the ditch, draining moisture and reducing water stains, and doing good field management of spring crops. Jiangnan and South China should do a good job in water and fertilizer management of early rice, and promote the formation of reasonable groups and the formation of large spikes. Pay attention to drought prevention and drought resistance in Southwest China, and transplant a season of rice and flue-cured tobacco at the right time.
All localities should strengthen the monitoring and prevention of plant diseases and insect pests. In May, diseases and insect pests such as wheat and rice entered the stage of high incidence, and monitoring and prevention of disease and insect pests should be strengthened everywhere.
In addition, Wang Zhihua also reminded that it is necessary to do a good job of forest fire protection in key areas. May is still a season of frequent forest and grassland fire hazards, and the northeast region has entered a key fire prevention period. It is recommended to strengthen the patrol defense and fire source management in forest areas and pastoral areas, organize favorable rain conditions to organize artificial rain enhancement operations, and reduce the fire risk meteorological grade. During the May Day holiday, the forest and grassland fire hazard meteorological grades in northeastern Inner Mongolia, Northeast China, and North China are relatively high. Pay attention to the safety of wild fires during the holidays.
Jiangnan, South China, Southwest and other places need to prevent various disasters caused by strong convective weather and local heavy rainfall. In May, strong convective weather in Jiangnan and South China increased further. It is necessary to guard against strong convective weather such as short-term heavy precipitation, thunderstorms, and local torrential rains and floods, as well as geological disasters such as debris flows and landslides, as well as flooding disasters in farmlands and cities.