NOUS41 KWBC 011157
PNSWSH
Technical Implementation Notice 11-42
National
Weather Service Headquarters
755 AM EDT Thu Sep 1 2011
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information
Network
-NOAAPORT
Other NWS Partners, Users and Employees
From: Tim McClung
Chief, Science Plans Branch
Office of Science and Technology
Subject: Real-Time Mesoscale Analysis to Become
Operational:
Effective October 4,
2011
Effective
Tuesday, October 4, 2011, with the 1200 Universal Coordinated Time (UTC) cycle,
the Real-Time Mesoscale Analysis (RTMA) will be upgraded from experimental to
operational status. These elements have
been available experimentally from the National Centers for Environmental
Prediction (NCEP) since 2006.
The
RTMA is a set of gridded surface analyses for the elements listed in Table 1
below. NCEP uses all readily-available satellite, ASOS, METAR, mesonet, buoy, ship and other surface or near-surface sensor
data that can be gathered in near-real time to generate the RTMA. Analyses are
generated for CONUS at 5 and 2.5 km, Alaska at 6 km, and Hawaii, Puerto Rico,
and Guam at 2.5 km. All of these fields for all of the resolutions listed above
are currently disseminated on NOAAPORT.
The
transition to operational status will not affect these NOAAPORT products because
they will keep their current WMO headers as listed below.
RTMA
grids are also available in the National Digital Guidance Database (NDGD) for
the domains listed above, except for the CONUS, for which only 2.5 km horizontal
resolution RTMA grids are available. When moved to operational status, the
location of the RTMA grids will move from:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.rtma/ to
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.rtma/
The
filenames on NDGD will stay the same during this transition.
Table
1: WMO Headings Assigned to the RTMA grids
available on NOAAPORT at 5 km and 2.5 km horizontal resolution
WMO
HEADING RTMA PARAMETERS
LT*A98
KWBR temperature analysis
LT*A98
KWBR temperature analysis uncertainty
LR*A98
KWBR dewpoint temperature analysis
LR*A98
KWBR dewpoint temperature analysis
uncertainty
LN*A98
KWBR wind speed analysis
LN*A98
KWBR wind speed analysis uncertainty
LN*A98
KWBR wind direction analysis
LN*A98
KWBR wind direction analysis uncertainty
LU*A98
KWBR u wind component analysis
(NOAAPORT ONLY)
LP*A98 KWBR surface pressure analysis
LP*A98 KWBR surface pressure analysis uncertainty
LH*A98 KWBR RTMA model terrain height
LEMA98
KWBR Accumulated precipitation (5km
for CONUS only)
LEIA98
KWBR Accumulated precipitation (2.5km
for CONUS only)
LAMA98
KWBR GOES effective cloud amount
(CONUS only)
Where
* is A for
For
questions regarding these changes, please contact:
Geoff DiMego
NCEP/EMC Mesoscale Modeling
Branch
301-763-8000 x 7221
NWS
National Technical Implementation Notices are online at:
http://www.nws.noaa.gov/os/notif.htm
$$
NNNN
|