The ninth typhoon "Mesak" was generated this year. What is the strongest level?

When Mesak landed on the coast of Gyeongsangnam-do, South Korea on September 3, the maximum wind force in the center was 14, which was a super typhoon.

On August 26th, a tropical disturbance was generated in the northern waters of Palau, and the disturbance number was 94W given by the US Naval Research Laboratory. At 3: 30, the joint typhoon warning center jointly established by the US Navy and the US Air Force in Pearl Harbor, Hawaii upgraded its rating to "medium".

At 2 pm on August 27th, Japan Meteorological Agency upgraded it to tropical depression. At 4pm, joint typhoon warning center upgraded its rating to "High" and issued a tropical cyclone warning.

At 2 am on August 28th, the Japan Meteorological Agency issued a gale warning. The Hong Kong Observatory said at 1: 45 a.m. that "the low pressure area in the sea east of the Philippines is gradually increasing, and a tropical cyclone seems to be forming". On 10 in the morning, joint typhoon warning center upgraded it to a tropical depression and gave it a tropical cyclone number of 10W. At 1 1: 45 am, the Hong Kong Observatory upgraded it to a tropical depression. At 2 pm, the Japan Meteorological Agency upgraded it to a tropical storm, giving it the international number 2009 and naming it "Mesak". At 5 pm, the Central Meteorological Observatory upgraded it to a tropical storm. The predictions of the major numerical forecasts for Mesak are quite consistent, and they all predict that Mesak will move northward, close to South Korea or northern Kyushu, Japan. At this point, in the absence of diverted flow, Messac stays where he is.

Due to the hot seawater of 30 degrees Celsius and weak vertical wind shear, the strength of Mesak has steadily increased. At 2 am on August 29th, Japan Meteorological Agency upgraded it to a severe tropical storm. At 8 pm, the Japan Meteorological Agency upgraded it to a typhoon.

At 5 am on August 30, the Central Meteorological Observatory upgraded it to a typhoon. In response to the strengthening and westward extension of the subtropical ridge, Mesak began to move northward on the morning of the 30th, with a speed of 20km/h, and then accelerated to move to the northwest on the 30th, with a speed of 25km/h ... At the same time, the intensity of Mesak continued to rise, and deep convective clouds surrounded the lower circulation center and rolled out the eyes of clouds. Mesak was upgraded to a strong typhoon by the Central Meteorological Observatory at 8: 30 pm, and it was also upgraded by the Hong Kong Observatory at 3 1 3: 30 am.

3 1 after sunrise, the satellite cloud image shows the eye structure of Mesak, and its eye wall gradually becomes round and clearly visible. The Hong Kong Observatory and the Central Meteorological Observatory upgraded Mesak to a super typhoon at 9: 45 p.m. and 2: 25 a.m. on September/KLOC-0 respectively. Subsequently, the moving speed of "Mesak" gradually decreased to 15-20k m/h, maintaining the northwest path, and entered the East China Sea in the early morning of/kloc-0 via the sea area between Miyako Island and Okinawa Island. At the same time, Mesak began to have a binocular wall structure, which means that it began to enter the eye wall replacement cycle.

However, Mesak began to enter the area with strong vertical wind shear, and with the eye wall replacement cycle, Mesak strength began to decline. At 9: 45 am on the 2nd, the Hong Kong Observatory downgraded it to a strong typhoon. However, the seawater temperature near Mesak is still 28 degrees Celsius, so its weakening trend is relatively slow.

"Mesak" accelerated to 40 kilometers per hour and continued to advance northeast. According to the Korea Meteorological Agency, Mesak first passed through Chojo Island in Gyeongsangnam-do at 12: 40 am on the 3rd, and then landed in Busan at120 am. At 2 am, the Hong Kong Observatory downgraded it to a typhoon. At 4 o'clock in the morning, the joint typhoon warning center issued the last warning. In the morning 1 1, North Korea announced that Mesak had landed from Jince City, North Hamgyong Province. According to the China Meteorological Bureau, Mesak entered the territory of helong city in Yanbian Korean Autonomous Prefecture around 13: 40. At 2 pm, the Japan Meteorological Agency said that Mesak had turned into an extratropical cyclone and the Hong Kong Observatory downgraded it to a tropical storm. Then at 8 pm, it said that Mesak had turned into an extratropical cyclone.

Mesak took the northwest route in the early morning of the 4th, with a speed of 15 to 20km/h, entered Inner Mongolia at noon and went deep into the northeast, and continued to weaken. The Central Meteorological Observatory stopped numbering Messac at 5 pm.