WMO Hydrological Observing System

WMO Hydrological Observing System

The WMO Hydrological Observing System (WHOS) is  a portal to the online holdings of National Hydrological Services (NHS) around the world that publish their historical observation and/or real-time data without restrictions or cost. It represents the hydrological component of the WMO Integrated Global Observing System (WIGOS).
 
Important Notes: WHOS is being developed and implemented in phases.  The map interface appearing above is a provisional product designed for demonstration and testing in preparation for a review of the WHOS concept at the 15th Session of the Commission for Hydrology (CHy-15) in December 2016.  A full WHOS implementation is subject to approval by CHy-15.
 

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