NOUS41 KWBC 042047



Public Information Statement, Comment Request

National Weather Service Headquarters Washington DC

448 PM EDT Wed Jun 4 2014


To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS users and employees


From:    Mark Tew

         Chief, Marine and Coastal Weather Services Branch


Subject: Experimental Period Extended until at least March

         31, 2015, for the Experimental Gridded Marine Offshore

         and High Seas Forecasts in the National Digital

         Forecast Database (NDFD)


Until at least March 31, 2015, the NWS Tropical Analysis and

Forecast Branch (TAFB) and Ocean Prediction Center (OPC) will

continue to provide to the National Digital Forecast Database

(NDFD), on an experimental basis, gridded forecasts of four

marine weather elements over their offshore waters and high seas

forecast areas of responsibility (AOR) in the Atlantic and

Pacific. The Weather Forecast Offices (WFO) in Fairbanks,

Anchorage and Juneau, AK, are currently providing five weather

elements over their offshore waters on an experimental basis to

the NDFD in the Arctic Ocean, Bering Sea and Gulf of Alaska



TAFB will continue to provide the grids to NDFD for all of their

offshore and high seas areas of responsibility. OPC will continue

to provide offshore grids while their high seas forecast grids

are expected to be added at a later date.  Offshore and high seas

forecast grids from the Honolulu Weather Forecast Office (HFO)

will also be added at a later date.


The gridded marine parameters include surface wind direction and

speed, wind gusts, significant wave heights and marine hazards.

The Alaska offices also produce a weather grid.


The upper right latitude, longitude for this new oceanic grid is

79.99N, 10.71E. The lower left corner lies directly on NCEP grid

204 point, which coincides with all other Pacific region NDFD

grids. The lower left latitude, longitude for this grid is

30.42S, 129.91E. Specific information on the grid domain can be

found at


Areas of the offshore grids that coincide with the NDFD CONUS

grid are included in the CONUS mosaic.


Each offshore and high seas producer update its grids at least

four times per day. 


The experimental marine grids are online at:


More details regarding these elements are available in the

Product Description Document in the online catalog of

Experimental NWS products and services available at:


Forecasts for these zones will be available from NDFD in the

following standard methods:


- Gridded Binary version 2 (GRIB2) files via Hypertext Transfer

- Protocol (HTTP) and File Transfer Protocol (FTP)

- Extensible Markup Language (XML) via Simple Object

  Access Protocol (SOAP)

- Graphics via web browser


Graphics for the oceanic grid area available via the 

experimental NDFD map viewer located at:


Both graphics, and XML via SOAP, are available within 30 days of

the grids being produced.


Information on accessing and using NDFD elements is online at:


Comments and feedback on these experimental TAFB Offshore and

High Seas NDFD elements, as well as the OPC Offshore elements,

are welcome at:


GRIB2 users:


Users OF XML SOAP service:


NDFD online graphics:


These Offshore and High Seas Marine elements will remain

experimental until at least March 31, 2015, when NWS assesses

feedback and completes a Technical analysis. At that time, the

NWS will determine whether to move these experimental elements to

operational status, discontinue them, or revise and extend the

experimental feedback period. Users will be notified of that

decision via another Public Information Statement and a new

implementation date will be established.


If you have questions regarding this notice, please contact:


  David Soroka

  National Marine Program Manager    

  National Weather Service Headquarters

  Silver Spring Maryland 20910



For general questions regarding NDFD data, please email:


For technical questions regarding NDFD data, please contact:


  David Ruth

  Mesoscale Prediction Branch Chief

  NOAA/NWS Office of Science and Technology

  Silver Spring, Maryland



NDFD Public Information Statements are online at:


All National Technical Implementation Notices are online at: