World Meteorological Organization (WMO)

Organisation météorologique mondiale (OMM)
Organización Meteorológica Mundial (OMM)

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1947-10-11 Washington DC USA


Established on signature of a convention on behalf of 42 states at conclusion of 12th Conference of Directors of H-XH2259 - International Meteorological Organization (IMO), an international nongovernmental organization founded in 1873.

IMO continued to function on an interim basis, pending formal establishment of the World Meteorological Organization which took place, 23 Mar 1950, on coming into force of the IMO Convention. Resources and obligations of IMO were transferred to WMO, 4 Apr 1951, at 1st Congress.

Agreement between the United Nations and WMO approved, 20 Dec 1951, by UN General Assembly, established WMO as a specialized agency of A-XA3375 - United Nations (UN) within F-XF1000 - United Nations System, linked to E-XE3377 - ECOSOC.

Statutes registered in 'UNTS 1/998' and 'ICAO 840'.


Facilitate worldwide cooperation in the establishment of networks of stations for the making of meteorological observations as well as hydrological and other geophysical observations related to meteorology; promote the establishment and maintenance of centres charged with the provision of meteorological and related services; promote the establishment and maintenance of systems for rapid exchange of meteorological and related information; promote standardization of meteorological and related observations and ensure the uniform publication of observations and statistics; further the application of meteorology to aviation, shipping, water problems, agriculture and other human activities; promote activities in operational hydrology and further close cooperation amongst national meteorological and hydrological services; encourage research and training in meteorology and, as appropriate, in related fields and assist in coordinating the international aspects of such research and training.


2024-07-07 | Sapporo, Japan – Global Energy and Water EXchanges Open Science Conference

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World Meteorological Congress (every 4 years), consists of delegates representing Member governments; it fixes policy, programme and budget. Executive Council (meets annually) is the executive body and comprises 37 Directors of National Meteorological or Hydrometeorological Services, including President, 3 Vice-Presidents, 6 Regional Presidents and 27 members elected by the Congress. Executive Council: supervises implementation of decisions of Congress; studies and makes recommendations on any matter affecting international meteorology and related WMO activities and the operation of meteorological and hydrological services; provides members with technical information and advice; administers the finances. Regional Associations (for Africa, Asia, South America, North America, Central America and the Caribbean, South-West Pacific, and Europe), comprise WMO members whose meteorological or hydrological stations are in or extend into the region concerned; they coordinate meteorological activity within their respective regions. Technical Commissions (8), comprising international experts, study various branches of meteorology and its applications and present technical recommendations to Congress and the Executive Council for approval:

  • Aeronautical Meteorology (CAeM);
  • Agricultural Meteorology (CAgM);
  • Atmospheric Sciences (CAS);
  • Basic Systems (CBS);
  • Climatology (CCl);
  • Hydrology (CHy);
  • Instruments and Methods of Observation (CIMO);
  • Joint WMO/IOC Oceanography and Marine Meteorology (JCOMM).

Secretary-General, appointed by Congress, heads Secretariat at WMO Headquarters in Geneva (Switzerland), which undertakes technical studies, prepares specialized publications, acts as secretariat during the meetings of various WMO bodies and generally maintains liaison and coordination among WMO bodies, WMO members and other international organizations; it also serves as an information centre for members and non-member states, various institutions and the public.


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Relations with Inter-Governmental Organizations

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Relations with Non-Governmental Organizations

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Type I Classification

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Type II Classification

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Subjects *

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UN Sustainable Development Goals **

GOAL 4: Quality EducationGOAL 6: Clean Water and SanitationGOAL 9: Industry, Innovation and InfrastructureGOAL 13: Climate ActionGOAL 14: Life Below WaterGOAL 15: Life on LandGOAL 17: Partnerships to achieve the Goal



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* Subject classification is derived from the organization names and aims.
** UN SDGs are linked to the subject classification.

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