How to distinguish typhoon grades

According to the notice of National Standard for Tropical Cyclone Grades (GBT 1920 1-2006) issued by China Meteorological Bureau, tropical cyclones are divided into six grades according to the maximum surface wind speed near the center:

Super typhoon (super typhoon)

The maximum average wind speed near the bottom center is ≥ 5 1.0m/s, that is, 16 or more.

violent typhoon

The maximum average wind speed near the bottom center is 41.5-50.9m/s, which is 14- 15.

typhoon

The maximum average wind speed near the bottom center is 32.7-4 1.4m/s, which is 12- 13.

Severe tropical storm

The maximum average wind speed near the bottom center is 24.5-32.6m/s, that is, the wind force is10-1.

tropical storm

The maximum average wind speed near the center of the ground floor is 17.2-24.4m/s, that is, the wind force is 8-9.

tropical depression

The maximum average wind speed near the center of the ground floor is10.8-17.1m/s, that is, the wind force is 6-7.

According to the statistics of the Typhoon Department of the Central Meteorological Observatory, among the tropical cyclones of magnitude 8 or above that landed in China in recent ten years (1995 to 2004), "strong typhoon" and "super typhoon" accounted for 15.9%. (Note: 1 nautical mile = 1.852 km) The word early warning is called early warning in English, which can be interpreted as: before disasters or disasters and other dangerous situations that need to be guarded, according to the laws summarized in the past or possible precursors observed, an emergency signal is sent to the relevant departments to report the dangerous situation, so as to avoid the hazards without knowing or being prepared. Therefore, the warning level of the most serious meteorological disaster is According to the standard of disastrous weather and climate intensity and the degree of casualties and property losses caused by major meteorological disasters, major meteorological disasters are identified as four levels of early warning: general (level IV), major (level III), serious (level II) and particularly serious (level I): level I early warning: particularly serious (red). In the administrative area of a province (autonomous region or municipality) or within the administrative areas of several provinces, the meteorological offices and stations subordinate to the competent meteorological departments shall make disaster forecasts. Or the meteorological level of geological disasters reaches level 5, and the meteorological level of forest (grassland) fire danger reaches level 5. Level II early warning: major (orange) in a province (autonomous region, city) administrative region, the meteorological stations subordinate to the competent meteorological department forecast a disastrous weather and climate process, and its intensity reached the disastrous weather and climate standard formulated by the competent meteorological department of the State Council. Or the meteorological grade of geological disasters reaches Grade 4, and the forest (grassland) fire risk grade reaches Grade 4. Grade III early warning: In a large (yellow) administrative area of a province (autonomous region or municipality), the meteorological stations subordinate to the competent meteorological department forecast the occurrence of disastrous weather and climate process, and the intensity reached the major disastrous weather and climate standards formulated by the competent meteorological department of the State Council. Or the meteorological grade of geological disasters reaches Grade III, and the meteorological grade of forest (grassland) fire danger reaches Grade III. Iv-level early warning: generally (blue), in a province (autonomous region or municipality) administrative region, the meteorological offices and stations subordinate to the competent meteorological department forecast the occurrence of disastrous weather and climate process, and the intensity reaches the disastrous weather and climate standard stipulated by the competent meteorological department of the State Council, or the meteorological grade of geological disasters reaches Grade II, and the meteorological grade of forest (grassland) fire danger reaches Grade II.