WMO Information System (WIS)
The WMO Information System (WIS) is a technical framework implemented by WMO Members for sharing authoritative data on weather, water, climate and environment.
WIS has evolved to WIS 2.0 to support the new WMO Unified Data Policy. WIS 2.0 provides the framework for WMO data sharing in the 21st century for all WMO domains and disciplines. WIS 2.0 was designed to make international, regional, and national data sharing simple, effective, and inexpensive. The idea that no Member should be left behind and the objective of lowering the barrier to adoption has been at the core of WIS 2.0 development. These objectives inspire the principles underpinning the WIS 2.0 technical framework, such as adopting open standards and Web technologies to facilitate sharing of increasing variety and volume of real-time data.
Following the successful completion of its pilot and pre-operational phases (2022-2024), WIS2 officially entered its operational phase in January 2025. This marks a significant milestone in the global transition toward a more modern, efficient, and accessible information system for meteorological, hydrological, and environmental data.
The new data-sharing infrastructure will gradually replace the Global Telecommunication System (GTS) during the transition period (2025-2033).
