What do you think of the scope of typhoon influence?

1. Typhoon mainly affects areas. 2. How many kilometers can a typhoon cause strong winds and heavy rains? 3. Which areas are affected by the typhoon? 4.202 1 Where does the typhoon affect? 5. Areas affected by typhoons? Typhoon mainly affects areas.

The first affected areas are Hainan, Guangdong, Fujian, Zhejiang and Taiwan Province.

It can be said that 80% of typhoon disasters in China are concentrated in these five provinces. Regardless of landing on the mainland again after landing on the mainland, since 1945, the number of typhoons that landed in Qiongtai in Zhejiang, Fujian and Guangdong has reached more than 45-while the number in other provinces is less than10; The typhoons that landed in China with super typhoon intensity (the maximum wind force near the center reached 16) are all distributed in Zhejiang, Fujian, Guangdong and Qiongtai provinces.

The second affected areas are Shandong, Jiangsu, Shanghai, Jiangxi and Guangxi.

Although there are occasional typhoons landing in these provinces, the intensity is generally not strong, mainly due to the influence of typhoon periphery. Typhoon, gale and precipitation still have some power in these provinces. Although Jiangxi is located inland, it is often affected by landing typhoons along the southeast coast.

The third affected areas are Yunnan, Hunan, Hubei, Anhui, Henan, Hebei, Beijing, Tianjin and Liaoning.

These provinces are basically affected by typhoons. Among them, although Hebei and Liaoning are located in the coastal areas, there are almost no typhoons landing directly. In inland provinces such as Henan and Hunan, the rain disasters caused by individual typhoons (such as 7503 and 0604) are still quite terrible. Anhui is also a region with frequent typhoon disasters in these provinces.

The fourth disaster-stricken areas are Tibet, Guizhou, Shaanxi, Shanxi, Inner Mongolia, Jilin and Heilongjiang.

Tibet is mainly affected by the Indian Ocean cyclone in southern Tibet, and some typhoons with strong vitality (such as 56 12) can wash up on the plateau, affecting Shaanxi, Shanxi, Inner Mongolia and other provinces. Jilin and Heilongjiang are sometimes affected by typhoons landing on the Korean Peninsula and Russia's Primorsky Territory.

The fifth affected areas are Xinjiang, Gansu, Qinghai, Ningxia, Sichuan and Chongqing.

These provinces are too inland, and it is normal that typhoons (including Indian Ocean cyclones) have little impact on them.

A typhoon can cause strong winds and heavy rains within several kilometers.

The range of strong wind and heavy rain caused by typhoon is related to the diameter of typhoon and the structure of typhoon itself.

Generally speaking, the larger the diameter of typhoon, the larger the scope of wind and rain area. The diameter of most typhoons is 600- 1000 km, the largest reaches 2000m, and the smallest is only 100km. The typhoon eye is the central area of the typhoon, and the downdraft is dominant, with little or no wind on the ground and sunny or cloudy weather. The radius of typhoon eye is generally 5-30km.

The outer circle of a typhoon, with a radius of about 200-300 km, is also called a windy area. It is characterized by the rapid increase of wind power to the center of the typhoon, which can generally reach magnitude 6 or above, but the precipitation intensity is relatively weak, mainly small to moderate rain or moderate to heavy rain.

The middle circle of typhoon is also called vortex area, and the radius from the edge of strong wind area to the eye wall of typhoon is about 100km. It is the area with the strongest wind and rain, and the wind force reaches 12 or more in heavy rain, even heavy rain and extremely heavy rain.

As for typhoons, according to Changjiang Daily, the intensity is determined and graded by the maximum wind force near its center internationally.

1, super typhoon (above 16, the maximum average wind speed is greater than 5 1.0m/s).

2. The maximum average wind speed of strong typhoon (14~ 15) is 4 1.5~50.9 m/s. ..

3. The maximum average wind speed of typhoon (12~ 13) is 32.7 ~ 41.4m/s. ..

4. The maximum average wind speed of the severe tropical storm (10~ 1 1) is 24.5 ~ 32.6m/s. ..

5. Maximum average wind speed of tropical storm (magnitude 8~9)17.2 ~ 24.4m/s. ..

6. Maximum average wind speed of tropical depression (magnitude 6~7) 10.8~ 17. 1 m/s. ..

Which areas are affected by typhoons?

65438+

Yesterday, moderate to heavy rain occurred in parts of Inner Mongolia, Yunnan, Zhejiang and other places: from 08: 00 yesterday to 06: 00 today, moderate to heavy rain occurred in parts of northeastern Inner Mongolia, western Yunnan, eastern Tibet and northeastern Zhejiang, and local heavy rains occurred in Dehong, Lincang and Shaoxing, Zhejiang (50-94 mm; There are 7~8 gusts in central and eastern Inner Mongolia, northwestern Hebei, eastern Jiangsu, eastern Shanghai and eastern Zhejiang, with local gusts of 9~ 1 1.

2. Foreign reality

Heavy rainfall occurred in northern South America on the Korean Peninsula: Indian Peninsula, Ganges Plain, Indo-China Peninsula, Southeast Asia, Korean Peninsula, Western Siberia, Central Siberia, Far East, Western Europe, Central and Eastern Europe, western Canada and Labrador Peninsula, Alaska, the eastern and southeastern coastal areas of the United States, Mexico, northern South America, Patagonia Plateau, southern Australia, New Zealand, southern West Africa and Central Africa.

How hot is the weather in the western United States and central Brazil? The highest temperature in Arabian Peninsula, Iranian Plateau, Mesopotamia Plain, Indus Plain, Central and Western Central Asia, North Africa, the western United States, central and southern Canada, central Brazil and northwestern Australia exceeds 35℃, reaching 38~42℃ in some areas and 44℃ in some areas.

Second, the key weather forecast

1. Key weather in China

(1 Southwest and other places have more rainfall.

On September 6, there were small to moderate rains and local heavy rains in Tibet, southern Qinghai, western Sichuan and western Yunnan. From July 7 to 9, there were small to moderate rains and local heavy rains in central and eastern Tibet, southern and eastern Qinghai, Sichuan, Guizhou and Yunnan. Rainfall will also occur in South China from east to west.

(2) The impact of Typhoon Xuanlannuo on China is coming to an end.

This year'sNo. 1 1 Typhoon Xuanlannuo (the strong typhoon center entered the Korean Strait from the northeast of the East China Sea yesterday (night of the 5th)) is located in the southeast of Korea at 5 o'clock on the 6th, that is, 35.2 degrees north latitude and 129.3 degrees east longitude. The maximum wind force near the center is14 (42m/s), and the lowest pressure in the center is 955 hectopascals. It is expected that Xuan Lannuo will soon enter the Sea of Japan and move rapidly to the northeast at a speed of about 70 kilometers per hour. Its intensity will gradually weaken and become an extratropical cyclone. With the impact on China coming to an end, the Central Meteorological Observatory lifted the typhoon blue warning at 06: 00 on September 6.

Affected by it, from 08: 00 on September 6 to 08: 00 on September 7, there were 6-7 winds in the northeastern part of the East China Sea, the central, eastern and southeastern parts of the Yellow Sea, with gusts of 8-9; There are 4~6 winds in Northeast China, and gusts are 7~8. There is moderate to heavy rain and local heavy rain in eastern Heilongjiang.

2. Key weather abroad

(1 There is heavy precipitation on the Korean Peninsula and Canada.

In the next three days, there will be moderate to heavy rain, local or heavy rain in Indian Peninsula, Ganges Plain, Indo-China Peninsula, Southeast Asia, Korean Peninsula, West Siberia, Central Siberia, Far East, Canada, the eastern and southeastern coasts of the United States, Mexico, northern South America, southern Brazil, eastern Australia, west Africa, northern Central Africa and northern East Africa. Some of the above areas are accompanied by strong convective weather such as thunderstorms and strong winds.

(2) West Asia, North Africa, the western United States and other places continue to have high temperatures.

In the next three days, parts of West Asia, Central and South Asia, North Africa, the western United States, northern Australia and central Brazil will have high temperature above 35℃, and the daily maximum temperature in parts of West Asia and North Africa will exceed 42℃.

Three. Specific weather forecast for the next three days

From 08: 00 on September 6 to 08: 00 on September 7, there were sleet in parts of northern Tibet and southern Qinghai, moderate to heavy rain in parts of northeastern Heilongjiang, southeastern Tibet, eastern Guangdong, southwestern Fujian and most of Taiwan Province Province, among which there was heavy rain (50-70 mm) in parts of northeastern Heilongjiang. There are 4~6 winds in parts of southeastern and northwestern Inner Mongolia, northeastern Heilongjiang and Shandong Peninsula (see figure 1.

Figure 1 National Precipitation Forecast Chart (08: 00 on September 6-08: 00 on September 7)

From 08: 00 on September 7 to 08: 00 on September 8, there were sleet in parts of northern Tibet and southern Qinghai, moderate rain in parts of southeastern Tibet, southwestern Shaanxi, western Sichuan Plateau, southern Fujian, southwestern Jiangxi, southern Hunan, most of Guangdong, eastern Guangxi and southern Hainan Island, with heavy rain (25-40 mm) in parts of northern Guangdong and southern Hainan Island. There are 4~6 winds in parts of central Inner Mongolia, Hexi in Gansu, northern Hebei, Liaodong Peninsula, Shandong Peninsula and eastern Jiangsu (see Figure 2.

Figure 2 National Precipitation Forecast Chart (08: 00 on September 7-08: 00 on September 8)

From 08: 00 on September 8 to 08: 00 on September 9, there were sleet in parts of northern Tibet and southern Qinghai, and moderate rain in parts of southeastern Tibet, southern Sichuan, northwestern Yunnan, southern Hunan, southwestern Jiangxi, central and western Guangdong and central and eastern Guangxi. Among them, heavy rain (25 ~ 40 mm) has 4~5 winds in parts of western Heilongjiang, Liaodong Peninsula and northern Hebei (see Figure 3.

Figure 3 National Precipitation Forecast Chart (08: 00 September-08: 00 September)

202 1 where did the typhoon affect?

1. History is second! The precipitation in the north is as high as 697.8 mm this summer.

The precipitation in summer and autumn this year has caused serious floods in many places in the north. The rainy season in North China starts early and ends late, with more rainfall 1 times. On July 15- 18, due to the heavy rainfall in the north, the water levels of many rivers continued to rise, and the flood peak flow of Beiyishui River in Haihe River Basin reached 536 cubic meters per second, the largest flood since 1963.

Expert comment: The average precipitation in northern China this year reached 697.8 mm, 40.3% more than normal, the second highest in history, second only to 1964. Especially in Beijing, Tianjin, Hebei, Shanxi, Henan, Shaanxi and other six provinces (cities), the precipitation reached 196 1 year, the highest in history.

2. Innovation record! Henan 1 hour rainstorm 201.9mm.

202 1, 17-24, the cumulative precipitation of 39 counties and cities in Henan province reached half of the annual precipitation, among which Zhengzhou, Huixian and Qixian 10 counties and cities exceeded the annual precipitation. The coverage area with accumulated rainfall exceeding 250 mm accounts for 32.8% of Henan's land area. The maximum rainfall intensity in Zhengzhou 1 hour reached 20 1.9mm, setting a new record for hourly meteorological observation rainfall in Chinese mainland.

Expert comment: Record-breaking extreme precipitation events have occurred in many places in Henan Province, with the characteristics of large cumulative rainfall, wide range of heavy precipitation, strong extreme precipitation, short-term heavy precipitation concentration and long duration.

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Zhengzhou City, Henan Province has serious water accumulation. Photo courtesy of China Meteorological Bureau

3. The drought is serious! Shantang Reservoir in South China dried up.

This year, the precipitation in South China is less 17%, the least since 2004, and the characteristics of staged meteorological drought are outstanding. From October to early February in 65438/kloc-0, moderate meteorological drought occurred in South China. From the end of March, meteorological drought with moderate intensity or above appeared again, which lasted until the beginning of 10. 1 1 year 10 to the beginning of February 1 year, there was less local precipitation in most parts of South China, and meteorological drought occurred in some areas.

Expert's comment: Frequent meteorological droughts have caused low soil water content in South China, the river water level has dropped, and the Shantang Reservoir has dried up, which has adversely affected agricultural production, forest fire prevention and life production. Salt tide appeared in the Pearl River Estuary, which affected the safety of water supply and power grid in Hong Kong.

4. break the record! Typhoon Fireworks stayed on land in China for 95 hours.

This year, 22 typhoons were generated in the Northwest Pacific and South China Sea, five of which landed in China, and the number of typhoons generated and landed was less than normal. Among them, Typhoon No.6 "Fireworks" landed in Zhejiang twice on July 25th and 26th, which was the first typhoon to land in Zhejiang twice since 1949 had meteorological records.

Expert's comment: "Fireworks" move slowly, and the detention time on land in China is as long as 95 hours, the longest since 1949; The accumulated rainfall is large, and the maximum accumulated rainfall at a single point exceeds1000 mm; The influence range is wide, and the cumulative rainfall of 50 mm and above covers an area of 352,000 square kilometers.

5. History is rare! The latest super typhoon "Rey" affecting the South China Sea.

Typhoon Rey, the 22nd this year, was generated in the western Pacific Ocean in June 5438+February 65438+March. This is the strongest typhoon that directly hit the Nansha Islands in China in history, and it is also the latest super typhoon that affected the South China Sea. It has the characteristics of high intensity, less northward path, wide wind influence range, high wind speed and heavy disaster.

Expert's comments: after Rey entered the South China Sea, there was windy weather in most sea areas, with gusts of 8 ~ 10 in Nansha Islands, zhongsha islands and the eastern coast of Hainan Island, 12 in some islands and reefs and 13 in Zhubi Reef (41.4m/s).

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65438+February 18 "Rey" once again reached the super typhoon level. Photo courtesy of China Meteorological Bureau

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The track map of Typhoon Rey. Photo courtesy of China Meteorological Bureau

6. Cold and warm conversion! Extreme high temperature appeared in the north in February.

65438+1October 6-8, the central and eastern parts were affected by cold wave weather, and the temperature dropped by 6 ~ 12℃ in most areas, and the local temperature exceeded12℃; Dalian, Liaoning and Shandong Peninsula have moderate to heavy snow and local snowstorms. The lowest temperature in more than 50 counties and cities in Beijing, Hebei, Shandong, Shanxi and other provinces and cities has exceeded or reached the historical extreme since the station was established. In February 18-2 1 day, the temperature in most parts of China rose, and the temperature in North China, Huanghuai, Jianghuai and other places rose rapidly. On February 2 1 day, the highest temperature in Beijing reached 25.6℃, and the extreme warm event brought great challenges to the test match of Beijing Winter Olympics.

Expert comment: The national average temperature in February was 2.9℃ higher than normal, the highest since 196 1. In 787 counties and cities, the daily maximum temperature in winter has exceeded the historical extreme since meteorological records were recorded.

7. Cold air is frequent! After autumn, strong cold waves hit six times.

165438+1October 4-9 is the national cold wave weather, which has the characteristics of large cooling range, wide rain and snow range, strong extremes and great influence, and its comprehensive intensity index ranks fourth in history. There are 429 counties and cities in China that have reached or exceeded the extreme daily cooling threshold, of which 1 16 has reached or exceeded the historical extreme value.

Expert comment: Since autumn, cold air activities have been frequent, and there have been 1 1 cold air processes in China, of which 6 times have reached the cold wave weather standard. The cold wave has a great influence on agriculture, transportation and electricity in most parts of China.

8. There are many tornadoes! Severe convective weather caused serious disasters.

On July 2 1, extreme gale and hail weather occurred in some areas of Qingyuan District, Baoding, Hebei Province, and Donglu Township was hit by a tornado. 65438+1October 2-4, there was heavy wind and rain in Liaoning, and hail occurred in Dalian, Anshan, Benxi, Dandong, Yingkou, Tieling and Huludao.

Expert comment: Since the beginning of this year, there have been 47 regional severe convective weather processes in China, the first time (March 30th -3 1, 15 days later than normal, and the last time (June 10, 2-4, 16 days later than normal; Tornado weather occurred at least 39 times, including moderate intensity above 16 times, which were more than normal, more in the north and weaker in South China.

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A tornado occurred on May 14, and the rescue location was found in Junshan District, Economic Development Zone, Wuhan City. Photo courtesy of China Meteorological Bureau

9. 10 years is the strongest! Encountered the strongest sandstorm in March.

On March 13- 18, the strong sandstorm was the strongest in recent 10 years. The peak concentration of PM 10 in many places in the north exceeds 5000 μ g/m3, among which the maximum concentration of PM 10 in Beijing exceeds 7000 μ g/m3 and the minimum visibility is 500 ~ 800 meters.

Expert comment: Sandstorm weather in China this year has the characteristics of early occurrence, strong intensity and wide influence. The start time (65438+ 10 month 10) is 35 days earlier than that from 2000 to 2020, which is the earliest since 2002. The number of strong sandstorms is the highest since 2000 (2 times), and all of them occurred in March. Dust weather has a great influence on China's transportation, people's life and production.

10. Add "Newcomer"! Two new members of Fengyun meteorological satellite family

On June 3rd and July 5th this year, China successfully launched two Fengyun meteorological satellites. As the first star of the new generation FY-4 operational satellite in geostationary orbit, FY-4 B has achieved continuous observation in high orbit for the first time in the world, with a maximum spatial resolution of 250 meters.

Expert comment: Fengyun -3E, as the world's first civilian morning and evening orbit meteorological satellite, makes China the first country in the world with simultaneous observation capability of three satellites in the morning and evening, fills the technical gap of international morning and evening orbit meteorological satellites, and improves the capabilities of "watching the ocean" and "watching the sun".

Typhoon affected areas

Typhoon mainly affects the northern South China Sea, the Taiwan Province Strait, Taiwan Province Province and its eastern coast, the western East China Sea and the Yellow Sea.

Every year, 20.2 typhoons affect China's coastal areas, of which 7.4 typhoons land (statistics 1949 ~ 1979). No typhoon landed in China from June to April, and the south bank of Hangzhou Bay in China may be affected by typhoon. The most frequent route is to move westward between 10 and 15 north latitude, and then turn to Japan via the waters near Ryukyu Islands. The other one moves westward and enters the northern part of the South China Sea.

From July to August, China's coastal areas are more likely to be affected by typhoons, mainly moving westward between north latitude 15 ~ 25, affecting China. The area affected by typhoon from September to June in China is mainly in the south of the Yangtze River estuary. The most frequent path moves westward between north latitude 15 ~ 20, and then turns northeast to affect Japan; The other path intermittently moves westward into the South China Sea, affecting Vietnam and Guangdong Province.

In September, there was another path between these two paths that affected Taiwan Province Province and Fujian Province. From June 1 1 to June 65438+February, only the area west of the Pearl River Estuary in Guangdong Province was occasionally affected by typhoons.