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GB/T 32935-2025: Grade of global tropical cyclones
Status: Valid GB/T 32935: Evolution and historical versions
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| GB/T 32935-2025 | English | 299 |
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Grade of global tropical cyclones
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GB/T 32935-2025
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| GB/T 32935-2016 | English | 219 |
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Grade of global tropical cyclones
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GB/T 32935-2016
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PDF similar to GB/T 32935-2025
Basic data | Standard ID | GB/T 32935-2025 (GB/T32935-2025) | | Description (Translated English) | Grade of global tropical cyclones | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A47 | | Classification of International Standard | 07.060 | | Word Count Estimation | 14,143 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-08-01 | | Older Standard (superseded by this standard) | GB/T 32935-2016 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 32935-2025: Grade of global tropical cyclones---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 07.060
CCSA47
National Standard of the People's Republic of China
Replaces GB/T 32935-2016
Global tropical cyclone scale
Released on 2025-04-25
2025-08-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Global tropical cyclone classification method 1
4.1 Monitoring sea areas 1
4.2 Division rules 1
4.3 Division indicators 1
5 Classification of tropical cyclones in different sea areas around the world 1
5.1 Northwest Pacific and South China Sea 1
5.2 South Pacific and waters near Australia 2
5.3 North Indian Ocean 2
5.4 Southwest Indian Ocean 3
5.5 North Central Pacific, Northeastern Pacific and North Atlantic (Caribbean Sea and Gulf of Mexico) 3
Appendix A (Normative) Division of Global Tropical Cyclone Monitoring Areas 4
Appendix B (Normative) Chinese-English Comparison Table of Global Tropical Cyclone Grade Names 5
References 7
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 32935-2016 Global Tropical Cyclone Scale. Compared with GB/T 32935-2016, in addition to structural adjustments and
In addition to editorial changes, the main technical changes are as follows.
--- Added the rules for the classification of tropical cyclone intensity when a tropical cyclone moves from one sea area to another (see 4.2);
--- Added tropical cyclone classification indicators (see 4.3);
--- The tropical cyclone classification in the South Pacific and the waters near Australia was deleted (see 3.2.2 and 3.2.3 of the.2016 edition);
--- Changed other relevant information corresponding to the maximum average wind speed near the bottom center (see 5.1~5.5, 3.2.2~3.2.6 of the.2016 edition);
--- Changed the sea areas that adopt the same standard for tropical cyclone classification (see 5.2, 3.2.2 and 3.2.3 of the.2016 edition);
--- Added some tropical cyclone grades (see 5.2, 5.3, 5.5, Appendix B);
--- Changed the range of maximum wind speed near the center corresponding to some tropical cyclone levels (see 5.3, 5.4, 3.2.4, 3.2.5 of the.2016 edition);
--- Changed the name of the tropical cyclone area in the southwest Indian Ocean (see 5.4, 3.2.5 of the.2016 edition);
--- Added the normative appendix "Global tropical cyclone monitoring sea area division" (see Appendix A);
--- Added the normative appendix "Chinese-English comparison table of global tropical cyclone grade names" (see Appendix B).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Meteorological Administration.
This document is under the jurisdiction of the National Technical Committee for Standardization of Meteorological Disaster Prevention and Mitigation (SAC/TC345).
This document was drafted by. National Meteorological Center.
The main drafters of this document are. Lv Xinyan, Dong Lin, Qian Qifeng, Zhao Wei, Xu Yinglong and Gao Shuanzhu.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2016 as GB/T 32935-2016;
---This is the first revision.
Global tropical cyclone scale
1 Scope
This document defines the classification of tropical cyclones in various ocean areas around the world.
This document applies to operations, services and scientific research on tropical cyclones.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 19201-2006 Tropical cyclone scale
3 Terms and definitions
There are no terms or definitions that require definition in this document.
4 Global tropical cyclone classification method
4.1 Monitoring sea areas
According to Appendix A, the global tropical cyclone monitoring areas are divided into the Northwest Pacific and South China Sea, the South Pacific, the waters near Australia, the North Indian Ocean, and the South China Sea.
There are eight geographical regions corresponding to the Indian Ocean, Southwest Indian Ocean, North Central Pacific Ocean, Northeast Pacific Ocean, and North Atlantic Ocean (Caribbean Sea and Gulf of Mexico).
4.2 Division rules
When a tropical cyclone moves from one sea area to another, the tropical cyclone level is divided according to the tropical climate in the sea area where the tropical cyclone center is located.
The grade of rotation is divided into different levels.
The tropical cyclone grades in the Northwest Pacific and South China Sea should be classified according to the provisions of GB/T 19201-2006.
Cyclone levels should be classified according to the level regulations of the World Meteorological Organization's tropical cyclone regional professional meteorological forecast centers.
The Chinese and English names of the global tropical cyclone levels should comply with the provisions of Appendix B.
4.3 Division indicators
The tropical cyclone grade is divided according to the maximum average wind speed near the center of the bottom layer (10m).
Note. The average time of wind speed in different sea areas is different.
5.Classification of tropical cyclones in different sea areas around the world
5.1 Northwest Pacific and South China Sea
The classification of tropical cyclones in the Northwest Pacific and the South China Sea should comply with the provisions of Table 1.
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