China News Service, August 4th. Zhao Zhiqiang, deputy director of the Emergency Disaster Mitigation and Public Service Department of the China Meteorological Administration, pointed out on the 4th that it is expected that in August, the temperature in most parts of the country will be close to normal to the same period of the year to high, and there is a possibility of high temperature above 35 ℃ throughout the country. Sex is still great, and "sauna days" with high temperature and humidity may appear in some areas.
At a press conference held by the China Meteorological Administration on the 4th, Zhao Zhiqiang introduced July weather and climate events, forecasts of future climate trends and weather service reminders.
Zhao Zhiqiang introduced that since the main flood season in June, the weather situation and climate in my country have been complicated, and the overall climate has been uneven. In the south, heavy rainfall is frequent, and the regional average precipitation is 450.1 mm, which is 17% more than the same period in normal years, which is the most in the same period since 1961. The main features are early in the plum blossom, late in the plum blossom period, long period of the plum rain, and heavy rainfall in the plum season. The Yangtze River Basin, the Huaihe River Basin and the Taihu Lake Basin have abnormally high precipitation, the number of rainstorm days and the long duration, the high degree of overlap of rain areas, and the large accumulated rainfall. The daily rainfall is heavy and extreme.
First, the precipitation in the Yangtze River Basin and the Taihu Lake Basin are the highest in the same period in history. In July 2020, the national average precipitation was 125.7 mm, 4% more than the same period in normal years. The precipitation belt is mainly concentrated in the middle and lower reaches of the Yangtze River and the eastern part of Southwest China. Both Hubei and Anhui provinces have the highest precipitation in the same period since 1961. The precipitation in the Yangtze River Basin (297.9 mm) and the Taihu Lake Basin (355.5 mm) were 64% and 110% higher than normal, respectively, the highest in the same period in history; the Huai River Basin was 27% higher.
Second, there are many days of high temperature in southern Jiangnan and southern China, which are extremely extreme. In July, the number of high temperature days in southern Jiangnan and most of southern China was generally 10-27 days, 5-17 days longer than normal. The average number of high temperature days in South China is 12 days, which is the most in the same period since 1961. The high temperature is extremely extreme, and the 12 stations in South China broke the local historical extreme value. In addition, in the late second half of the year, the extreme high temperature in the Sichuan Basin was also very strong, with 10 stations breaking the local historical extreme value.
Third, "empty Taiwan" in July is rare in history. There was no typhoon in July this year, making it the first "empty station" since 1949. In comparison, there were 3.7 typhoons in the Northwest Pacific and South China Sea in July, and 2 landed in my country.
The fourth is the development of meteorological drought in southern South China and central and southern Northeast China. In July, precipitation in most of Northeast China, central and southern South China and other places was 50% to 90% less than that of the same period in normal years, and the temperature was 1 to 4°C higher, and meteorological drought occurred.
Zhao Zhiqiang also introduced the release of early warning information nationwide in July: In July 2020, about 47,000 early warning messages were issued nationwide. Among them, about 44,000 pieces of meteorological disaster warning information were issued. The number of meteorological risk warning information issued for rainstorms, thunderstorms, hail and geological disasters increased by 19%, 23%, 18% and 15% respectively over the same period last year. These warnings are used in disaster prevention. Disaster reduction decision-making and grassroots organizations played a good role in disaster avoidance. In addition, use the national emergency early warning information release system to issue early warnings for natural resources, health and health commissions, water conservancy, emergency management, housing construction, diplomacy, early warning centers, agriculture and rural areas, public security, civil defense offices, education, ecological environment, and transportation. 2979 pieces of information.
Regarding the forecast of the climate trend in August, Zhao Zhiqiang said that in the next ten days (August 5-14), the main rainfall areas will be located in the eastern part of Northwest China, central and southern North China, Northeast China, Huanghuai, southern China, eastern Southwest China and southeastern Tibet. And the eastern part of Zhejiang, the cumulative rainfall is generally 50-80 mm, of which the southern part of North China, the eastern Huanghuai, the central and southern South China, the western Sichuan Basin and the western and southern parts of Yunnan are 120-200 mm, and the local area can reach 250 mm. ~ 350 mm; the cumulative rainfall in most of the above-mentioned areas is 50% to 1 times more than that in the same period of normal years, and more than 2 times more in local areas. In Jiangnan, the eastern part of the Sichuan Basin, Xinjiang and other places, there will be 4-8 days of high-temperature weather with a daily maximum temperature of 35-38℃, and the local area can reach 39-40℃. There will be a low pressure disturbance or typhoon near the South China Sea or the Philippines.
Main weather process: This year's No. 4 Typhoon "Hagupit" weakened from a typhoon to a severe tropical storm this morning (4th), and its center was located in Pan'an County, Jinhua City, Zhejiang Province (28.9 degrees north latitude, 120.6 east longitude) at 10 am Degree), the maximum wind force near the center is 11 levels (30 m/s), and the minimum air pressure in the center is 980 hPa. It is expected that "Hagupit" will move northward at a speed of about 20 kilometers per hour, and its intensity will gradually weaken, passing through north-central Zhejiang and south-central Jiangsu, moving from central Jiangsu into the Yellow Sea on the morning of the 5th, and then turning to the northeast. Moving in the direction, gradually towards the western coast of the Korean Peninsula.
Affected by "Hagupit", since the 3rd, there have been torrential rains or heavy rains in southeastern Zhejiang, local heavy rains in Wenzhou (271-466 mm), with a maximum hourly rainfall of 50-98 mm; and coastal areas of southeastern Zhejiang have seen grades 10 to 13 Gusts, individual island gusts up to 15-17. From the next 4 to 6 days, the wind force in the western East China Sea, Zhejiang coast, Hangzhou Bay, Yangtze River estuary, Shanghai coast, and southern Jiangsu coast will be level 9-10, and some sea areas will reach level 11; on the 4th, east-central Zhejiang, Jiangsu There will be heavy rains in the southeast, Shanghai and other places, and there will be extremely heavy rains locally, after which the rainfall will be significantly weakened.
From the 5th to the 7th, there will be moderate to heavy rains in the eastern part of Northwest China, central and southern North China, Huanghuai and Sichuan Basin, and heavy rains in some areas and heavy rains in some areas; the above-mentioned areas will be accompanied by strong convective weather such as thunderstorms, gales and hail.
From the 8th to the 10th, there were moderate to heavy rains in parts of Sichuan Basin, southern Huanghuai, Jianghan, Jianghuai and other places, with heavy rains or heavy rains locally; showers or thundershowers in North China and Northeast China. After 11 days, there will be another significant precipitation process in the eastern part of Northwest China, North China, and Northeast China.
Regarding the August climate forecast, it is expected that there will be more precipitation in central Inner Mongolia, southern Northeast China, North China, Huanghuai, western Jianghan, northern Southwest, eastern Northwest, southern South China, and western Tibet in August. The temperature in most parts of the country is close to normal to the same period of the year, and the temperature in most parts of Jiangnan, South China, and southern Southwest China is 1 to 2℃ higher. It is estimated that in August, 2 to 3 tropical cyclones may land or affect my country's coastal areas, close to the same period of normal years (2).
Zhao Zhiqiang pointed out that the weather service reminders in August mainly include: first, flood prevention and disaster reduction. my country is still in the main flood season in August, and all localities still need to pay close attention to changes in rain, water and flood conditions, and continue to do a good job in flood prevention. North China, Northeast China and other northern regions have entered the rainy season, and rainfall has increased. It is necessary to prevent various secondary disasters that may be induced by heavy rains, floods and heavy rainfall, and to prevent the adverse effects of local convective weather.
The second is to prevent heatstroke. In August, there is still a high possibility of high-temperature weather above 35°C across the country, and some areas may also have high-temperature and high-humidity "sauna days", which will affect public life, health, and water and electricity supply. The public should pay close attention to the high temperature warning issued by the meteorological department and take timely measures to prevent heatstroke and reduce temperature.
The third is to take precautions against typhoons. August is still the most active season of typhoons. South China and the southeast coastal areas need to focus on the prevention of typhoon storms, floods, gales and storm surge disasters, and prepare for typhoons in advance.
The fourth is to do a good job in preventing and reducing agricultural disasters. In August, the southern part of Northeast China, the eastern part of Northwest China, northern China, Huanghuai, and northern Southwest China had more precipitation. It is necessary to prevent heavy precipitation from causing waterlogging of farmland; the temperature in northern Heilongjiang, most of Liaoning, and eastern Inner Mongolia is low, pay attention to prevent phases Low temperature causes crops to become greedy and late; there are too many high temperature days in Jiangnan and South China, which are unfavorable to the growth and development of crops and fruit trees; South China and southeast coastal areas should pay attention to the adverse effects of strong storms and rain brought by typhoons on agriculture and fishery production.