What is the typhoon prevention level?

Typhoon prevention is divided into six grades: tropical depression, tropical storm, strong tropical storm, typhoon, strong typhoon and super typhoon.

1, tropical depression: the maximum wind speed is 6 ~ 7, (10.8 ~ 17. 1 m/s).

2. Tropical storm: the maximum wind speed is 8-9, (17.2-24.4m/s).

3. Severe tropical storm: maximum wind speed 10 ~ 1 1, (24.5 ~ 32.6m/s).

4. Typhoon: maximum wind speed 12 ~ 13, (32.7 ~ 4 1.4m/s).

5. Strong typhoon: maximum wind speed14 ~15 (41.5 ~ 50.9 m/s).

6. Super typhoon: the maximum wind speed is ≥ 16 (≥ 5 1.0m/s).

On July 2065438+April 18 19:30, the super typhoon "rammasun" (Thailand's name, Raytheon) landed in Xuwen, Zhanjiang, Guangdong Province, which began to affect its departure from Guangdong. Because of its extreme nature, it created a series of new records in the history of Taiwan defense in our province.

According to Lin Liangxun, chief forecaster of the Provincial Meteorological Observatory, rammasun has these characteristics.

First, typhoons are the strongest. Against the background of this year's El Ni? o outbreak, rammasun entered the South China Sea from the western Pacific Ocean, accumulating energy while walking. In just 42 hours, it changed from a typhoon to a super typhoon. When landing in Guangdong, the wind speed near the center reached 60 meters per second, and the lowest pressure was 9 10 hectopascals. These two indicators, which represent the intensity of typhoon, both exceed the extreme values since the typhoon was recorded in Guangdong.

Second, the most landing sites. A typhoon landed in three provinces in South China and landed in the Philippines. * * * There are four landing sites, which are rare in history. This is mainly due to the fact that rammasun has been marching in the northwest direction since its formation, which forms a tangent with the coastal land directions of Guangdong, Hainan and Guangxi. Most of the places covered by typhoons are oceans, which are conducive to the accumulation of energy, while the land area is small and the intensity will not weaken too fast, which is conducive to its re-landing.

The third is the highest emergency level. The provincial government issued the first emergency mobilization order for defense work on June 5438+08. In view of the extreme rammasun, emergency headquarters Office of Guangdong Province upgraded the typhoon emergency response level to the highest level I at 22: 30 on July 17, and the Provincial Defense General also upgraded the typhoon emergency response level to level I on June 18 10. 1 The highest level of emergency response has been started, which is also rare in our province.

When a general (level IV) incident occurs, the deputy commander-in-chief and director of the office of the municipal defense index decides to start the level IV emergency response and implement the level IV emergency response action.

(1) The executive deputy director of the Municipal Finger Prevention and Control Office organized the municipal departments of emergency management, water conservancy, meteorology, natural resources planning, agriculture and rural areas, and maritime affairs to hold a consultation meeting.

(2) the city refers to the work notice, deputy director and deputy director of the city refers to the office on duty.

(3) The deputy commander and director of the office of the city's anti-finger prevention contact the relevant districts and counties (cities) for mobilization and deployment.

(4) The Municipal Meteorological Bureau shall report the weather forecast results at least twice a day, and update the forecast at any time when there are obvious changes in the weather conditions monitored and analyzed.

(5) The Municipal Water Conservancy Bureau shall report the flood forecast results at least twice a day.

(6) The Municipal Natural Resources Planning Bureau reports the monitoring and forecasting results of geological disasters, storm surges and waves twice a day, and provides technical support for surveying and mapping geographic information in real time according to the demand.

(7) The member units of the municipal anti-finger index report the work dynamics to the municipal anti-finger index on a daily basis with 15.

(8) Flood control at the county level in flood and typhoon-stricken areas refers to reporting the progress of events and work dynamics to the municipal flood control index 15 every day, and reporting sudden disasters and dangerous situations in time.