Powerful computers in WMO centres worldwide process the data collected from tens of thousands of land and sea observation instruments and Earth-observing satellites. These data are used in numerical models based on physical laws to produce weather, climate and water-related forecasts, predictions, and information products and services for use in daily lives, long-term decision-making and research.
Built on the Global Telecommunication System of the WMO World Weather Watch, the WMO Information System (WIS) provides routine collection and automated dissemination of observed weather, climate and water-related data and products, as well as information discovery, access and retrieval services.