What is SHEF and why does the NWS want it?

SHEF is the Standard Hydrologic Exchange Format.  This format was defined to give standards to how hydrologic data is exchanged between agencies and computer systems.  The SHEF format is used to transfer data from individual local government data collection systems into the MADIS system where it is collected and redistributed to all of the various NWS around the U.S.

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