NOUS41 KWBC 051540

PNSWSH

 

Service Change Notice 17-64

National Weather Service Headquarters Silver Spring MD

1140 AM EDT Mon Jun 5 2017

 

To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS Partners, Users and Employees

 

From:     Dave Myrick

          NWS Office of Science and Technology Integration

 

Subject:  Upgrade of 2.5 km Gridded Model Output Statistics

          Guidance over the CONUS to operational status on or

          about July 18, 2017.

 

On or about July 18, 2017, The NWS Meteorological Development

Laboratory (MDL) will upgrade the Global Forecast System (GFS)-

based Gridded Model Output Statistics (MOS) guidance at 2.5 km

resolution over the Continental U.S. (CONUS) from experimental

to operational status, replacing the operational 5 km CONUS

guidance.

 

On November 15, 2012, MDL began disseminating experimental 

2.5 km Gridded MOS guidance over the CONUS, with the intention

of replacing the operational 5 km products at some future date

once all users and systems are able to use the higher resolution

guidance. These changes were announced in a Public Information

Statement issued on October 13, 2011, and in Technical

Implementation Notice 12-09. Public Information Statement 17-19

was issued on April 27, 2017, requesting comments on the change. 

No comments were received. These notices can be viewed at the

following links:

 

http://www.nws.noaa.gov/os/notification/pns11_2.5km.txt

 

http://www.nws.noaa.gov/os/notification/tin12-09gmos-conus_aaa.txt

 

http://www.nws.noaa.gov/os/notification/pns17-19disc5km_gmos.htm

 

MDL will upgrade the 2.5 km CONUS guidance from experimental to

operational status on or about July 18, 2017. At that time, the

5 km GRIB2 products will no longer be sent across the Satellite

Broadcast Network (SBN) or NOAAPORT, and will be replaced with

the 2.5 km products in the operational (ST.opnl) directory of

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

server (TGFTP).

 

Current location of 2.5 km CONUS Gridded MOS products on TGFTP:

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus/

 

Future location of 2.5 km CONUS Gridded MOS products on TGFTP

after transition to operational status:

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus/

 

A list of 5 km products and associated headers that will be

removed from the SBN, NOAAPORT and NDGD is provided in Table 1

below.  A list of 2.5 km products and associated headers that

will be moved from the experimental directory to the operational

directory in NDGD is provided in Table 2 below.  

 

Table 1: WMO communication identifiers for 5 km Gridded MOS

products that will be removed from the SBN, NOAAPORT, and NDGD

(below are representations of the WMO headers)

 

WMO HEADING       ELEMENT NAME

-----------    ------------------------------

LAUxxx KWBQ       Sky Cover

LBUxxx KWBQ       Wind Direction

LCUxxx KWBQ       Wind Speed

LDUxxx KWBQ       12-h Prob. of Precipitation

LEUxxx KWBQ       2-m Temperature

LFUxxx KWBQ       2-m Dewpoint Temperature

LGUxxx KWBQ       Daytime Maximum Temperature

LHUxxx KWBQ       Nighttime Minimum Temperature

LIUxxx KWBQ       6-h Quant. Precip. Amount

LJUxxx KWBQ       6-h Prob. of a Thunderstorm

LRUxxx KWBQ       Relative Humidity

LSUxxx KWBQ       24-h Snowfall Amount

LUUxxx KWBQ       6-h Prob. of Precipitation

LVUxxx KWBQ       12-h Quant. Precip. Amount

LWUxxx KWBQ       Wind Gusts

LXUxxx KWBQ       12-h Prob. of a Thunderstorm

LYUxxx KWBQ       3-h Prob. of a Thunderstorm

 

Table 2: WMO superheaders for 2.5 km Gridded MOS products that

will be moved from the experimental directory to the operational

directory on TGFTP (Below are representations of the

superheaders, where ii=98 for days 1-3, ii=97 for days 4-7, and

ii=96 for days 8 and beyond.)

 

SUPERHEADER       ELEMENT NAME

-----------     ------------------------------

MAUZii KWBQ       Cond. Prob. Freezing Precip.

MBUZii KWBQ       Cond. Prob. Frozen Precip.

MCUZii KWBQ       Cond. Prob. Liquid Precip.

YAUZii KWBQ       Sky Cover 

YBUZii KWBQ       Wind Direction

YCUZii KWBQ       Wind Speed

YDUZii KWBQ       12-h Prob. of Precipitation 

YEUZii KWBQ       2-m Temperature

YFUZii KWBQ       2-m Dewpoint Temperature

YGUZii KWBQ       Daytime Maximum Temperature

YHUZii KWBQ       Nighttime Minimum Temperature

YIUZii KWBQ       6-h Quant. Precip. Amount

YJUZii KWBQ       6-h Prob. of a Thunderstorm

YLUZii KWBQ       Precip. Type Best Category

YMUZii KWBQ       Precip. Potential Index

YNUZii KWBQ       Prob. Precip. Occurrence

YRUZii KWBQ       Relative Humidity

YSUZii KWBQ       24-h Snowfall Amount

YUUZii KWBQ       6-h Prob. of Precipitation

YVUZii KWBQ       12-h Quant. Precip. Amount

YWUZii KWBQ       Wind Gusts

YXUZii KWBQ       12-h Prob. of a Thunderstorm

YYUZii KWBQ       3-h Prob. of a Thunderstorm

YZUZii KWBQ       Predominant Weather

 

For questions or comments regarding this change please contact:

 

      Jeff Craven

      Chief, Statistical Modeling Branch

      Meteorological Development Laboratory

      Office of Science and Technology Integration

      Silver Spring, MD

      jeffrey.craven@noaa.gov

      301-427-9475

 

NWS National Service Change Notices are online at:

 

  http://www.weather.gov/os/notif.htm

 

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