NOUS41 KWBC 011411
PNSWSH
Technical Implementation Notice 11-20
National
Weather Service Headquarters Washington DC
1011 AM
EDT Wed Jun 1 2011
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather
Information Network
-NOAAPORT
Other
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
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.rtma/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
301-763-8000 x 7221
For questions regarding the dataflow aspects of these data
sets please contact: Rebecca Cosgrove
NCEP/NCO Dataflow Team
301-763-8000 X 7198
ncep.list.pmb-dataflow@noaa.gov
National
Technical Implementation Notices are online at:
http://www.weather.gov/os/notif.htm
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