NOUS41 KWBC 071322



Technical Implementation Notice 12-29

National Weather Service Headquarters Washington DC

922 AM EDT Thu Jun 7 2012


To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners and NWS Employees


From:     Eli Jacks

          Chief, Fire and Public Weather Services Branch


Subject:  Operational Ultraviolet Radiation Grids in the

          National Digital Guidance Database (NDGD), Effective

          Tuesday, July 10, 2012, for CONUS Only


Effective Tuesday, July 10, 2012, at 1400 Coordinated Universal

Time (UTC), NWS is making the following three ultraviolet

radiation grids operational in the National Digital Guidance

Database (NDGD) for the Conterminous United States (CONUS) only:


-Ultraviolet Index, for each daylight hour out to 48 hours

-Daily Maximum Ultraviolet Index, once per day out to 120 hours

-Downward Short Wave Radiation Flux, for every third daylight

hour out to 120 hours


These grids have been produced experimentally since March 2011.

See the link below for further information.


These grids are derived automatically from the 1200 UTC model run

of the Global Forecast System (GFS) for CONUS. 


More detail regarding these grids is available in a Product

Description Document (PDD) online at:

To access the operational grids use the following urls AFTER 1400

UTC, July 10, 2012:


For ftp access:



For http access:



More information on what the UV Index is and how it is computed

is available online at:




General information on accessing and using NDGD elements is

available online at:


For technical questions regarding NDGD data, please contact:


    David Ruth

    Chief, Mesoscale Prediction Branch

    National Weather Service

    Office of Science and Technology

    Silver Spring Maryland 20910


For questions regarding this notice, please contact:


    Jannie G. Ferrell

    National Weather Service

    Office of Climate Water and Weather Services

    Silver Spring Maryland 20910


National Technical Implementation Notices are online at: