The Statement by the World Meteorological Organization (WMO) on the Role and Operation of National Meteorological and Hydrological Services (NMHSs) presents information on the role and operation of NMHSs worldwide. The four sections of the document presen
World Meteorological Organization. Role and operation of National Meteorological and Hydrological Services: a statement by the World Meteorlogical Organization for Directors of NMHSs. 2015-01-01.