NOUS41 KWBC 261250 AAA



Service Change Notice 17-117 Updated

National Weather Service Headquarters, Silver Spring, MD

850 AM EST Fri Jan 26 2018


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners and Employees


FROM:     Allison Allen

          Chief, Marine, Tropical, and Tsunami Services Branch


SUBJECT:  Updated: Transition to operational status of offshore     

          and high seas gridded forecasts from the NHC TAFB and  

          the offshore gridded forecasts from the OPC in the

          Atlantic Basin effective February 6, 2018


Updated to change the implementation date to February 6, 2018,

or the next available non-critical weather day.


Effective on or about Tuesday, February 6, 2018, the

experimental offshore and high seas gridded forecasts from the

Tropical Analysis and Forecast Branch (TAFB) of the National

Hurricane Center (NHC) and the offshore gridded forecasts from

the Ocean Prediction Center (OPC) will transition to operational

in the Atlantic Basin. The five elements transitioning to

operational are:


-10-meter wind speed

-10-meter wind direction

-10-meter wind gusts

-significant wave height

-marine hazards.


Transitioning these forecasts to operational status is another

milestone for the NWS National Digital Forecast Database (NDFD). 

Users do not need to take any action when the experimental

forecasts transition to operational status. Gridded forecasts

from TAFB and OPC over the Pacific Basin and from OPC in the

rest of its high seas domain over the Atlantic, will remain

experimental. Another Service Change Notice (SCN) will be issued

when they are ready to move to operational status.


For details on this product, please see:


Until February 6, 2018, the gridded forecast files are online at:


On February 6, 2018 these URLs will change to:


The gridded forecast graphics can be found at:


For more information, please contact:


Richard May

Marine Meteorologist

NWS Headquarters, Silver Spring, MD 20910

(301) 427-9378


Eric Christensen

Acting Operations Branch Chief

NHC Tropical Analysis and Forecast Branch, Miami, FL 33165

(305) 229-4454


Darin Figurskey

Operations Branch Chief

Ocean Prediction Center, College Park, MD  20740

(301) 683-1497


National Service Change Notices are online at: