NOUS41 KWBC 231355 CCA



Public Information Statement, Corrected

National Weather Service Headquarters Washington DC

955 AM EDT Fri Oct 23 2015


To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS partners, users and employees


From:     Eli Jacks

          Acting Chief, Forecast Services Division


Subject:  Corrected: Comment period extended until July

          31, 2016, for the Experimental Gridded Marine

          Offshore and High Seas Forecasts in the National

          Digital Forecast Database (NDFD)


Corrected to add experimental in the first paragraph


Effective Tuesday, December 1, 2015, the NWS National Hurricane

Center's (NHC) Tropical Analysis and Forecast Branch (TAFB) will

provide 3-hourly temporal experimental gridded marine forecasts

out to 72 hours. Beyond 72 hours, the temporal experimental

resolution will continue at 6-hourly increments.


TAFB will continue to provide to the NDFD, on an experimental

basis, gridded forecasts of five marine weather elements over

its offshore waters and high seas forecast areas of

responsibility (AOR) in the Atlantic and Pacific basins.  The

National Centers for Environmental Prediction's (NCEP) Ocean

Prediction Center (OPC) will continue to provide to the NDFD, on

an experimental basis, gridded forecasts of five marine weather

elements over their offshore waters in the Atlantic and Pacific

basins. NWS Weather Forecast Offices (WFO) in Fairbanks,

Anchorage and Juneau, AK, will continue to provide six weather

elements over their offshore waters on an experimental basis to

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


OPC plans to add the high seas forecast grids on an experimental

basis in 2017. NWS expects to add offshore and high seas

forecast grids from WFO Honolulu, HI, in the near future. An

amended Public Information Statement will be issued announcing

the addition.


The gridded marine parameters include 10-meter wind speed, 

10-meter wind direction, 10-meter 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

Gridpoint 204, 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 updates 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 are available via the NDFD map

viewer located at:


Information on accessing and using NDFD elements is online at:


Comments and feedback on all these experimental Offshore and

High Seas NDFD elements, including the current oceanic grid

configuration (in current Mercator projection or some users

prefer latitude/longitude projection) 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 July 31, 2016, when the NWS will

assess 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:


Richard May

NWS Marine Meteorologist

Silver Spring, Maryland  20910



For general questions regarding NDFD data, please email:


For technical questions regarding NDFD data, please contact:


David Ruth

NWS/STI/Digital Forecast Services Branch

National Weather Service Headquarters

Silver Spring, Maryland 20910



NDFD Public Information Statements are online at:


National Public Information Notices are online at: