-------- Original Message --------
469
NOUS41 KWBC 011411
PNSWSH
Technical Implementation Notice 11-20
National Weather Service Headquarters Washington DC
1010 AM EDT Wed Jun 1 2011
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
Other NWS partners and NWS employees
From: Tim Mcclung
Chief, Science Plans Branch
Office of Science and Technology
Subject: Addition of 2.5 km RTMA Products to NOAAPORT
The National Centers for Environmental Prediction (NCEP) is now
disseminating new Real Time Mesoscale Analysis (RTMA) products
for the contiguous United States (CONUS) on NOAAPORT. The RTMA
is a set of gridded surface analyses and surface analysis
uncertainty fields made available at an hourly temporal
frequency. The CONUS RTMA was previously only available on
NOAAPORT at a horizontal resolution of 5 kilometers (km). These
new RTMA products have a horizontal resolution of 2.5 km.
The grids listed in Table 1 below are available at a resolution
of 2.5 km. The GOES effective cloud amount is not available at
the 2.5 km resolution and will continue to be provided at a
horizontal resolution of 5 km.
The intention is to remove the 5km RTMA products (with the
exception of the GOES effective cloud amount) from NOAAPORT and
all other distribution methods once sufficient time has passed
to allow necessary software upgrades. A separate announcement
will be sent prior to removing the 5km products.
Table 1: CONUS RTMA products available at 2.5 km resolution and
their associated WMO headers
WMO Header RTMA Parameter
LTIA98 KWBR temperature
LTIA98 KWBR temperature analysis uncertainty
LRIA98 KWBR dewpoint temperature
LRIA98 KWBR dewpoint temperature uncertainty
LNIA98 KWBR wind speed
LNIA98 KWBR wind speed analysis uncertainty
LNIA98 KWBR wind direction
LNIA98 KWBR wind direction analysis uncertainty
LUIA98 KWBR u wind component
LVIA98 KWBR v wind component
LEIA98 KWBR accumulated precipitation
LPIA98 KWBR surface pressure analysis
LPIA98 KWBR surface pressure analysis uncertainty
LHIA98 KWBR model terrain height
The RTMA data for the CONUS is also available from NDGD at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.r
tma/AR.conus
and on the NCEP server at:
http://www.ftp.ncep.noaa.gov/data/nccf/com/rtma2p5/prod
or
ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/rtma2p5/prod
There are three files for each hour located on the NCEP server.
Files with names such as rtma2p5.t00z.2dvaranl_ndfd.grb2 contain
all of the RTMA analysis fields and the associated errors, with
the exception of precipitation.
Files with names such as rtma2p5.t00z.2dvarges_ndfd.grb2 contain
the first guess fields used by the RTMA. Files with names such
as rtma2p5.t00z.pcpn_ndfd.grb2 contain the precipitation
analysis.
NCEP will continue to refine the RTMA. Users may provide
feedback on the experimental RTMA products at:
http://www.weather.gov/survey/nws-survey.php?code=rtma
For questions regarding the RTMA, please contact:
Geoff Dimego
NCEP/Environmental Modeling Branch
Camp Springs, MD 20746
301-763-8000 x 7221
geoff.dimego@xxxxxxxx
For questions regarding the dataflow aspects of these data
sets please contact:
Rebecca Cosgrove
NCEP/NCO Dataflow Team
Camp Springs, Maryland 20746
301-763-8000 X 7198
ncep.list.pmb-dataflow@xxxxxxxx
National Technical Implementation Notices are online at:
http://www.weather.gov/os/notif.htm
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