NOUS41 KWBC 041911 AAB PNSWSH Technical Implementation Notice 10-27: Amended National Weather Service Headquarters Washington DC 312 PM EDT MON OCT 4 2010 To: Subscribers: -Family of Services -NOAA Weather Wire Service -Emergency Managers Weather Information Network -NOAAPORT -Other NWS Partners, Users and Employees From: Tim McClung Science Plans Branch Chief Office of Science and Technology Subject: Amended: Addition of GFS-Based Gridded MOS Guidance For Hawaii Postponed to November 9, 2010 Amended to postpone effective date for addition of GFS-based gridded MOS guidance for Hawaii from November 2, 2010 to November 9, 2010. Implementation was delayed by 1 week to allow sufficient time for evaluation. The point of contact for this implementation also has been changed. Effective Tuesday, November 9, 2010, NWS will produce new global forecast system (GFS)-based gridded MOS guidance for Hawaii and disseminate it on the satellite broadcast network (SBN, NOAAPORT and the NWS ftp server. These guidance products will be in grib2 format. The new communication identifiers for these products are shown in Table 1 below. The gridded MOS products will contain guidance on a 2.5 km Mercator grid covering the same expanse as the National Digital Forecast Database (NDFD) Hawaii grid. Grids will be generated from the 0000 and 1200 Universal Coordinated Time (UTC) model runs at projections of 1 to 7 days in advance. Guidance will initially be available for the following elements with others to be added at a later date: Daytime Maximum and Nighttime Minimum Temperature 2-Meter Temperature 2-Meter Dewpoint Temperature Relative Humidity Wind Direction Wind Speed Wind Gusts Probability of Precipitation /6-H and 12-H/ A web page providing more information regarding grid specifications, grib2 encoding and elements for which guidance is available is referenced below. The grib2 products will be provided as part of the National Digital Guidance Database (NDGD). These products will initially be available on the NWS ftp server at: ftp://tgftp.nws.noaa.gov/sl.us008001/st.expr/df.gr2/dc.ndgd/gt.m osgfs/ar.hawaii Table 1: Communication Identifiers for the GFS-Based Gridded MOS Grib2 Products for Hawaii WMO HEADING ELEMENT LBSXXX KWBQ Wind Direction LCSXXX KWBQ Wind Speed LDSXXX KWBQ 12-Hour Probability of Precipitation LESXXX KWBQ 2-Meter Temperature LFSXXX KWBQ 2-Meter Dew Point Temperature LGSXXX KWBQ Daytime Maximum Temperature LHSXXX KWBQ Nighttime Minimum Temperature LRSXXX KWBQ Relative Humidity LUSXXX KWBQ 6-Hour Probability of Precipitation LWSXXX KWBQ Wind Gusts Each grib2 product has a unique WMO header. The table above lists representations of the WMO headers. A complete list of gridded MOS WMO headers is available at: http://www.nws.noaa.gov/mdl/synop/gmos/gmosheaders.pdf A web page outlining the gridded MOS guidance and the ftp server structure can be found online at: http://www.nws.noaa.gov/mdl/synop/gmos.php For questions regarding the new gridded MOS guidance for Hawaii please contact: Kathryn Gilbert MDL/Silver Spring, Maryland 301-713-0023, Ext. 130 Kathryn.Gilbert@noaa.Gov Links and descriptions to the MOS products are online: http://www.nws.noaa.gov/mdl/synop NWS national TINs are online at: http://www.weather.gov/os/notif.htm $$ NNNN