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-------- Original Message --------
536
NOUS41 KWBC 151221
PNSWSH
Technical Implementation Notice 11-18 AAB
National Weather Service Headquarters Washington DC
815 AM EDT Mon Aug 15 2011
To: Subscribers:
- Family of Services
- NOAA Weather Wire Service
- Emergency Managers Weather Information Network
- NOAAPORT
Other NWS partners, users and NWS employees
From: Tim McClung
Science Plans Branch Chief
Office of Science and Technology
Subject: Amended: Change to Experimental Gridded Localized
Aviation Model Output Statistics Program (LAMP)
Products: Effective August 23, 2011
Amended to announce the implementation date for changing the
experimental Gridded LAMP (GLMP) products for CONUS.
Effective on Tuesday, August 23, 2011, beginning with the 1200
Coordinated Universal Time (UTC) run, NWS will change the
experimental GLMP products for CONUS. The following changes to
the experimental data will occur:
1. Products will include WMO headers in anticipation of the
transition to operations
2. Products will be encoded with binary scaling to produce
smaller files
3. Special value to designate "unlimited ceiling height or
ceiling height"> 12,000 feet will change from the current
value of -1 to the new value of -100
Effective Tuesday, September 27, 2011, beginning with the
1200 Coordinated Universal Time (UTC) run, NWS will transition
the experimental GLMP products to operational status, at which
time the products will be disseminated on the Satellite
Broadcast Network (SBN), NOAAPORT, and will be available in the
operational National Digital Guidance Database (NDGD).
The Gridded LAMP products contain guidance on a 2.5 km
Lambert Conformal grid covering the same expanse as the
National Digital Forecast Database (NDFD) CONUS grid. Grids are
generated hourly consisting of gridded forecasts for
projections of 1 to 25 hours in advance as well as gridded
observations for the initial time of the Gridded LAMP cycle.
Grids will be available for the following elements with others
to be added later:
2-meter temperature observations and the associated error
estimations
2-meter dewpoint temperature observations and the associated
error estimations
Ceiling height observations
Visibility observations
2-meter temperature forecast guidance
2-meter dewpoint temperature forecast guidance
Ceiling height forecast guidance
Visibility forecast guidance
The products are available in GRIB2 format and are currently
available in the experimental NDGD. They are available on the
NWS server at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.
lmpgfs/AR.conus
or
http://weather.noaa.gov/pub/SL.us008001/ST.expr/DF.gr2/DC.ndgd/
GT.lmpgfs/AR.conus
Beginning September 27, 2011, the products will be available in
GRIB2 format in the operational NDGD, and will no longer be
available in the experimental NDGD. They will be available on
the NWS server at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.
glmp/AR.conus
or
http://weather.noaa.gov/pub/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/
GT.glmp/AR.conus
A web page outlining the Gridded LAMP products and the NWS
server directory and file structure can be found online at:
http://www.nws.noaa.gov/mdl/gfslamp/docs/glmpinfo.php
The new communication identifiers for the GRIB2 products are
shown below in Tables 1 and 2. A complete list of GLMP WMO
headings is available at
http://www.nws.noaa.gov/mdl/gfslamp/docs/glmpheaders.pdf
Table 1: Communication identifiers for the GLMP gridded
observation products in GRIB2 format. Listed below are
representations of the WMO headings. xxrepresents the valid UTC
hour (00-23).
WMO HEADING ELEMENT
----------- -------
LAUAxx KMDL 2-meter gridded temperature observations
LAUBxx KMDL 2-meter gridded temperature observation
error estimations
LBUAxx KMDL 2-meter gridded dewpoint temperature
observations
LBUBxx KMDL 2-meter gridded dewpoint temperature
observation error estimations
LCUAxx KMDL Gridded ceiling height observations
LDUAxx KMDL Gridded visibility gridded observations
Table 2: Communication identifiers for the GLMP gridded
forecast products in GRIB2 format. Listed below are
representations of the WMO headings. xx represents the forecast
projection (01-25).
WMO HEADING ELEMENT
----------- -------
LKUAxx KMDL Gridded 2-meter temperature forecasts
LLUAxx KMDL Gridded 2-meter dewpoint temperature forecasts
LMUAxx KMDL Gridded ceiling height forecasts
LNUAxx KMDL Gridded visibility forecasts
If you have technical comments or questions, please contact:
Judy Ghirardelli
National Weather Service
Meteorological Development Laboratory
Judy.Ghirardelli@xxxxxxxx
301-713-0056 x194
Links to the LAMP products and descriptions can found at:
http://www.nws.noaa.gov/mdl/gfslamp/gfslamp.shtml
National Public Information Statements are online at:
http://www.weather.gov/os/notif.htm
$$
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