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The WMO was established by the Convention of the World Meteorological Organization, [9] signed 11 October 1947 and ratified on 23 March 1950. The Convention serves as the constituent treaty of the WMO, setting forth its purposes, governance, and general framework. The WMO hierarchy:
The World Meteorological Organisation (WMO), an organization of the United Nations, was created on 23 March 1950 to replace the International Meteorological Organization. It began operations in 1951 to coordinate member nation in the fields of meteorology, operational hydrology, and Earth sciences for the security of their population. The first ...
The naming of North Atlantic tropical cyclones is currently under the oversight of the Hurricane Committee of the World Meteorological Organization (WMO). This group maintains six alphabetic lists of twenty-one names, with one list used each year. This normally results in each name being reused every six years.
Both codes are defined at the technical regulation level in WMO Technical Regulation No. 49, Vol II, which is copied over to the WMO Manual No. 306 and to ICAO Annex III. Although the general format of METARs is a global standard, the specific fields used within that format vary somewhat between general international usage and usage within ...
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
A WMO spokesperson said that the impact of rising water levels on Pacific islands was disproportionately high since their average elevation is just a meter or two (3.3 to 6.5 feet) above sea level.
The term "squall" is used to refer to a sudden wind-speed increase lasting minutes. In 1962 the World Meteorological Organization (WMO) defined that to be classified as a "squall", the wind must increase at least 8 metres per second (29 km/h; 18 mph) and must attain a top speed of at least 11 metres per second (40 km/h; 25 mph), lasting at least one minute in duration.
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