Republic Hydrometeorological Service of Serbia (RHMS) (www.hidmet.gov.rs) is the referential organization for making and presenting of weather forecasts and for issuing severe weather warnings. In December 2012, the Republic Hydrometeorological Service of Serbia (RHMSS) was assessed and certified as meeting the requirements of ISO 9001:2008, and in April 2013, the Meteorological Laboratory of the Department of Meteorological Observation System, RHMSS, fulfilled the requirements of SRPS ISO/IEC 17025:2006 within the specified scope of accreditation. With those standards, a significant improvement has been achieved in respect of acting within the jurisdiction, obligations and duties of RHMSS. RHMS participates in the following WMO commissions: Basic Systems, Instruments and Methods of Observations, Climatology, Atmospheric Science, Aeronautical Meteorology, Maritime Meteorology, Agricultural Meteorology, Hydrology. RHMS participates in the following programmes and projects: World Weather Watch, World Climate Programme, Programme of Atmospheric and Enviromental Research, Programme of Applied Meteorology, Programme of Technical Cooperation, Programme of Training and Education, Regional and Bilateral Programmes.