NOUS41
KWBC 151221 AAB
PNSWSH
Technical
Implementation Notice 11-18 AAB
National
Weather Service Headquarters Washington DC
821 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
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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