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NOAA/NOS Tsunami water level data products available over the GTS

Kahului, HI water level station that collects 1-minute sea level data ©NOAA/NOS/CO-OPS

On August 7, 2013, NOAA’s National Ocean Service (NOS) Center for Operational Oceanographic Products and Services (CO-OPS) released new data products over the Global Telecommunication System (GTS).   Included in this release is a set of one-minute water level data products, formatted into Character form for the Representation and EXchange of data (CREX) messages.  CREX is table-driven code that follows World Meteorological Organization definitions, and allows a large set of data to be succinctly formatted into a human-readable message.   One-minute water level data from each CO-OPS station is transmitted via GOES, Iridium, or phone/IP, and ingested into CO-OPS systems.  During this ingestion process, the data are organized into regionalized CREX bulletins and disseminated over the GTS.  WMO headers for these bulletins are:

SZNT31 KWBC (AtlanticCoast)

SZGX32 KWBC (GulfCoast)

SZCA33 KWBC (CaribbeanIslands)

SZPZ34 KWBC (PacificCoast)

SZAK35 KWBC (AlaskaCoast)

SZHW36 KWBC (Hawaii)

SZPA37 KWBC (Pacific Islands)

These products address a need for high-frequency sea level data collected at stations outside of the GOES footprint.  CO-OPS plans to also develop BUFR products (the binary counterpart to CREX) in the near future.

For more information on NOS/CO-OPS, please contact This email address is being protected from spambots. You need JavaScript enabled to view it.


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