NOUS41 KWBC 141520



Technical Implementation Notice 12-55

National Weather Service Headquarters Washington DC

1020 AM EST Wed Nov 14 2012


To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners, Users and Employees


From:     Tim McClung

          Science Plans Branch Chief

          Office of Science and Technology


Subject:  Addition of WMO Headers to 2.5-km GFS-based Gridded

          MOS GRIB2 Products on NWS FTP Server Effective on

          or about December 13, 2012


On or about Thursday December 13, 2012, beginning with the 1200

Universal Coordinated Time (UTC) model run, WMO headers will be

added to the experimental 2.5-km GFS-based gridded MOS GRIB2

products on the NWS FTP server.  At the present time these

products do not contain WMO headers.  On the change date, each

element-specific GRIB2 file will contain a super header and

individual headers for each forecast projection.  GRIB2 file

names for each gridded MOS element are listed in Table 1

below.  Representations of the WMO super headers are listed in

Table 2 below.


These GRIB2 products are available in the experimental area of

the National Digital Guidance Database (NDGD) on the NWS ftp

server.  Forecast guidance for Days 1 through 3 is available at:


Forecast guidance for days 4 through 7 is available at:


Table 1: GRIB2 file names for each experimental 2.5-km GFS-based

Gridded MOS element:


     FILE NAME       ELEMENT      Total Sky Cover

     ds.wdir.bin     Wind Direction

     ds.wspd.bin     Wind Speed

     ds.pop12.bin    12-Hour Probability of


     ds.temp.bin     2-Meter Temperature       2-Meter Dew Point Temperature

     ds.maxt.bin     Daytime Maximum Temperature     Nighttime Minimum Temperature

     ds.qpf06.bin    6-h Quantitative Precipitation


     ds.pts06.bin    6-h Probability of a Thunderstorm

     ds.rhm.bin      Relative Humidity

     ds.snw24.bin    24-h Snowfall Amount

     ds.pop06.bin    6-Hour Probability of


     ds.qpf12.bin    12-h Quantitative Precipitation


     ds.wgust.bin    Wind Gusts

     ds.pts12.bin    12-h Probability of a


     ds.pts03.bin    3-h Probability of a Thunderstorm


Table 2: WMO super headers for each experimental 2.5-km GFS-based

gridded MOS element.  Listed below are representations of the

super headers indicated by Z in the 4th character, where ii=98

for short-range guidance (days 1-3) and ii=97 for medium range

guidance (days 4-7):




   YAUZii KWBQ  Total Sky Cover

   YBUZii KWBQ  Wind Direction

   YCUZii KWBQ  Wind Speed

   YDUZii KWBQ  12-Hour Probability of


   YEUZii KWBQ  2-Meter Temperature

   YFUZii KWBQ  2-Meter Dew Point Temperature

   YGUZii KWBQ  Daytime Maximum Temperature

   YHUZii KWBQ  Nighttime Minimum Temperature

   YIUZii KWBQ  6-h Quantitative Precipitation


   YJUZii KWBQ  6-h Probability of a Thunderstorm

   YRUZii KWBQ  Relative Humidity

   YSUZii KWBQ  24-h Snowfall Amount

   YUUZii KWBQ  6-Hour Probability of


   YVUZii KWBQ  12-h Quantitative Precipitation


   YWUZii KWBQ  Wind Gusts

   YXUZii KWBQ  12-h Probability of a Thunderstorm

   YYUZii KWBQ  3-h Probability of a Thunderstorm


A complete list of the WMO headers is available at:


A Web page outlining the gridded MOS guidance and the FTP server

structure can be found at:


For questions regarding the experimental 2.5-km gridded MOS

guidance for the CONUS please contact:


  Kathryn Gilbert

  MDL/Silver Spring, Maryland

  301-713-0023, Ext. 130


Links to all MOS products and descriptions are at:


NWS national TINs are online at: