NOUS41 KWBC 201650 CCA



Service Change Notice 12-40: Corrected

National Weather Service Headquarters Washington DC

1250 PM EST Tue Nov 20 2012

Relayed by the National Weather Service


To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS partners and NWS employees


From:    Peter Stone

         Chief, Oceanographic Division

         NOS Center for Operational Oceanographic Products

         and Services (CO-OPS)


Subject: Corrected: NOS/CO-OPS is implementing model guidance

         Standard Hydrometeorological Exchange Format (SHEF)

         Bulletins, Effective December 5, 2012.


Corrected to indicate 12 OFS models will be released in SHEF Bulletins, not 13, and to include AWIPS Identifiers (AI) and WMO Headers for each SHEF Bulletin and the SHEF type-source code.


Effective December 5, 2012 at 1500 Coordinated Universal Time (UTC), NOS/CO-OPS will implement SHEF Bulletins using type-source code HMIFU for CO-OPS Operational Forecast System (OFS) water level model guidance.


CO-OPS currently produces SHEF bulletins of observed water level and meteorological data as well as astronomical tides. A new set of SHEF bulletins will be generated with total water level model guidance from the 12 operational CO-OPS OFS models. Ten OFS models (Chesapeake Bay, Delaware Bay, Tampa Bay, Northern Gulf of Mexico, Columbia River Estuary, and the five Great Lakes models) produce 48-hour model guidance of time series data updated every 6 hours, and two models (New York/New Jersey and St. Johns River) provide 24-hour model guidance updated every 6 hours. 


Model guidance is provided at the CO-OPS tide gauge locations. Thus, the OFS Water Level SHEF bulletins will contain the full 48-hour or 24-hour model guidance of 30-minute data and will be issued every 6 hours to remain consistent with the OFS output.  Modeled water levels are total water levels (astronomical tide plus surge). It is noted that CO-OPS models are not designed as a storm surge model, though meteorological parameters such as winds and air pressure are taken into account. Although the Operational Forecast Systems produce model guidance of currents, water temperature, and salinity, these data will not be included in the SHEF bulletins; however, they can be viewed and downloaded at the CO-OPS web site.  The Great Lakes SHEF OFS data will be in Local Standard Time (LST), whereas the rest of the OFS data will be in UTC, to meet user requirements.


The WMO header and AWIPS Identifiers (AI) for each OFS SHEF Bulletin (bulletins are grouped by OFS):


WMO Header    AI         OFS name

SOUS41 KWBC   TIDCB      Chesapeake Bay

SOUS41 KWBC   TIDDB      Delaware Bay

SOUS41 KWBC   TIDNY      New York and New Jersey

SOUS41 KWBC   TIDSJ      St. Johns River

SOUS42 KWBC   TIDTB      Tampa Bay

SOUS42 KWBC   TIDNG      Northern Gulf of Mexico

SOUS43 KWBC   TIDCR      Columbia River Estuary

SOUS44 KWBC   TIDLE      Lake Erie

SOUS44 KWBC   TIDLH      Lake Huron

SOUS44 KWBC   TIDLM      Lake Michigan

SOUS44 KWBC   TIDLO      Lake Ontario

SOUS44 KWBC   TIDLS      Lake Superior


The NWS Directive 10-944 SHEF Manual can be found at


Information about NOS/CO-OPS Operational Forecast System can be found at


Information about NOS/CO-OPS Products and Services can be found at


If you have any questions concerning these changes, please contact:

Kathleen Bailey


Silver Spring, MD



For questions on the CO-OPS OFS products and modeled water level data, please contact:

Dr. Aijun Zhang


Silver Spring, MD



For general questions on CO-OPS products and services, please contact:

Todd Ehret

NOS/CO-OPS/User Services Team

Silver Spring, MD



National Service Change Notices are online at: