The WMO Information System 2.0 (WIS 2.0) is the framework for WMO data sharing in the 21st century for all WMO domains and disciplines. It supports the WMO Unified Data policy and the Global Basic Observing Network (GBON) and makes international, regional, and national data sharing simple, effective, and inexpensive. The principles underpinning the WIS 2.0 technical framework, include indeed adopting open standards and Web technologies, to facilitate sharing of increasing variety and volume of real-time data. The Commission for Observation, Infrastructure and Information Systems (INFCOM) approved the technical specifications of WIS 2.0 and its implementation plan in October 2022. The new data-sharing infrastructure officially entered its operational phase on 1st January 2025, marking the start of the transition phase from GTS to WIS2.

Four types of Global Services are used to enable the dissemination of data in the WIS2 network:

• • Global Broker: Provides MQTT(S) Broker that re-publishes data notifications of all WIS2 Nodes. Users of WIS 2.0 will be able to access data in real-time by subscribing to a Global Broker and receiving notifications when new data is available for download from a Global Cache or the data provider WIS2 Node.
  • Global Discovery Catalogue: Provides a discovery catalogue, usable through an API or web interface, storing WIS 2.0 Discovery Metadata records. The Global Discovery Catalogue allows users to discover available datasets on WIS 2.0 and provides information on how and where to access the data.
  • Global Cache: Provides HTTP(S) server where core data (as defined in WMO Resolution 1) can be downloaded from.
  • Global Monitor: Provides monitoring dashboards based on metrics collected from other Global Services and alerting mechanism to ensure 24/7 operations.

More information on WIS 2.0 can be found on the dedicated WMO web page.