NOUS41 KWBC 271830

PNSWSH

 

Public Information Statement 17-19

National Weather Service Headquarters Silver Spring MD

230 PM EDT Thu Apr 27 2017

 

To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS Partners, Users and Employees

 

From:     Jeff Craven

          Chief, Statistical Modeling Branch

          Meteorological Development Laboratory

 

Subject:  Soliciting Public Comments on the Proposed Upgrade of

          2.5 km Gridded Model Output Statistics Guidance over

          the CONUS to operational status through May 31, 2017.

 

The Meteorological Development Laboratory (MDL) is proposing to

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.  

The NWS is seeking comments on this proposed change through 

May 31, 2017.

 

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. 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

 

MDL is proposing to upgrade the 2.5 km CONUS guidance from

experimental to operational status on or about mid-July 2017. 

At that time, the 5 km GRIB2 products will no longer be sent

across the Satellite Broadcast Network (SBN) and 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 are proposed

for removal 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 are proposed for removal 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

 

The NWS will evaluate all comments to determine whether to

proceed with this change.

 

Send comments on this proposal to:

 

      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

 

National Public Information Statements are online at:

 

   http://www.nws.noaa.gov/om/notif.htm

 

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