Beijing, March 3 (Wei Xianghui) According to the China Meteorological Administration, from April 31 to 4, a strong cold air will affect China from west to east, affected by it, there will be strong winds, severe cooling and rain and snow in the north, and the central and eastern regions will usher in the largest range of heavy rain and snow this year.
Heavy rain and snow weather is wide and intense
According to the forecast, from April 4 to 1, affected by strong cold air, the temperature in most of the north will drop by 5~6 °C, the cooling range in some areas of Inner Mongolia and other places can reach more than 10 °C, the temperature in the south will drop by 12~4 °C, and the land area of more than 8 °C will reach 10,94 square kilometers; There will be 4~6 winds and gusts of 7~9 in the central and eastern regions.
From the 1st to the 2nd, the cold air mainly affected the northwest region and Inner Mongolia, on the 3rd it mainly affected the northeast region, North China, Huanghuai and Jianghan and other places, and from the 4th to the 5th, it affected Jianghuai and the southern region.
In addition, there are sandstorms or floating dust in southern and eastern Xinjiang, central and western Inner Mongolia, Gansu, Ningxia and other places, among which there are local sandstorms in eastern and southern Xinjiang, western Inner Mongolia, and Hexi in Gansu. From the night of the 3rd to the day of the 5th, there will be 6~8 level winds and gusts of 9~10 in the eastern sea area of China.
National cooling amplitude forecast map Image source: Central Meteorological Observatory
From the night of April 4 to 1, there was moderate to heavy snow or sleet in eastern Gansu, Ningxia, northern Hebei and central and eastern Inner Mongolia, and heavy snowfall or heavy snowfall in central Inner Mongolia, and the main snowfall period was from 5 to 2 days; There were moderate to heavy rains in the southeast of Northwest China, the east of Southwest China, Jianghan, Jianghuai, Jiangnan, South China and Huanghuai, among which there were heavy rains in parts of southeastern Henan, eastern Hubei, Hunan, Anhui, Jiangxi, western Zhejiang, northern Guangxi, northern Guangdong and western Fujian. The main precipitation period is from 3 to 2 days.
The cumulative precipitation in the above areas is 20~50 mm, 70~120 mm in some areas, and up to 160 mm locally; More than 100 mm of rainfall covers an area of 23,30 square kilometers. Jianghuai and the south of Jianghuai are accompanied by short-term heavy precipitation, thunderstorms, strong winds or hail and other strong convective weather, the maximum hourly precipitation is 60~10 mm; The northern part of Jiangnan, the eastern part of Jianghan, Jianghuai and other places were accompanied by thunderstorms and winds above magnitude <>.
From the evening of April 4rd to noon on April 3, there will be light rain in Beijing, precipitation of 4~1 mm, 5 and 4 winds from 5 to 3, gusts of 4~5, accompanied by cooling of about 7 °C.
National precipitation forecast map Source: Central Meteorological Observatory
Expert: The impact has both advantages and disadvantages, and it is necessary to pay attention to transportation, agriculture and other aspects
Regarding the impact of the heavy rain and snow weather process, Fang Chong, chief forecaster of the Central Meteorological Observatory, said that on the whole, there are both advantages and disadvantages.
On the one hand, large-scale precipitation is conducive to alleviating the meteorological drought in areas with less precipitation in the early stage, and is conducive to crop growth and reservoir water storage.
Since the beginning of this year, the temperature in most of the central and eastern parts of China has been significantly higher, the precipitation is less, the precipitation in some areas is less than 3~8%, and severe meteorological drought has occurred in Shandong and other places. This severe rain and snow weather process is conducive to replenishing soil moisture, alleviating meteorological drought, and is beneficial to winter wheat rising, jointing and pregnant ear and early rice transplanting water in South China.
On the other hand, cooling, rain and snow will also adversely affect transportation, facility agriculture, animal husbandry and offshore operations.
Rain and snow in the north are prone to compressive collapse of agricultural facilities, resulting in freezing damage to crops, while heavy precipitation in the south may cause short-term waterlogging of some low-lying farmland. Therefore, he suggested that the northern region should do a good job of windproof reinforcement and warmth of facility agriculture and outdoor structures, and clean up the snow on the roof in time; The southern region should discharge stagnant water in time, and the tea-producing areas should pay attention to weather changes and pick spring tea in time.
In terms of traffic impact, Fang Chong suggested that ships sailing and operating in the Bohai Sea, the southern Yellow Sea, the East China Sea and other waters should pay attention to changes in offshore wind and return to port in time to avoid the wind. Travel in Inner Mongolia, Xinjiang and other places to prevent road icing. (End)