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MEMORANDUM FOR: Distribution E
FROM: John H. Ward
Chief, Production Management Branch
SUBJECT: Changes to the NWS Production Suite
The advertised changes to the BUFR data stored on the NCEP
supercomputer originally planned for 26 March, have been
postponed. A large number of requests for changes to
applications that utilize these BUFR codes were received this
week. Since all of these changes must be thoroughly tested in a
production environment prior to implementation, a date for the
BUFR data changes can not be determined at this time. An
additional two weeks notice will be provided prior to the BUFR
change implementation. ALL PROGRAMMERS WHO UTILIZE BUFR DATA
SHOULD DETERMINE IF THE PROPOSED BUFR CHANGES WILL IMPACT THEIR
PROCESSING AND TEST THEIR CODES WITH THE TEST DATASETS LISTED AT
THE BOTTOM OF THIS MEMO. If there are other codes which must be
modified prior to the BUFR data change, please submit JIFS as
soon as possible. See the bottom of this memo for more
information.
Items 182, 183, and 184 were implemented as advertised at
12Z on 19 March 2002. These items were pulled on the same day
due to a error with the package. These items were reimplemented
the following day, 20 March 2002, after the error had been
corrected.
Items 180 and 181, which were scheduled for implementation
at 12Z on 19 March 2002, were not implemented until 15 UTC on 20
March 2002.
A series of changes to the NCEP global model are planned for
this Spring. On Tuesday, 5 March 2002, at 12Z the forecast
length of the global AVN model was increased to 384 hours for all
four cycles. These extended forecast data are currently
available on the NCEP ftp server at:
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/avn/prod/.
On 27 March 2002 these data will become available on the NWS
ftp server at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/.
A tentative date of 23 April 2002 has been set to replace
the 00Z MRF model with the 00Z AVN. Look-alike grids for the MRF
will be created and disseminated from the 00Z AVN. These
look-alike grids will be available through Fall 2002. NCEP is
currently making these look alike grids in parallel production.
These data are available on the NCEP ftp server at:
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/mrf/para/.
Finally, in early June the resolution of the NCEP global
model will be increased from T170L42 to T254L64.
The change in resolution of the RUC model from 40 km to 20
km originally scheduled for Tuesday, 9 April at 12Z has been
rescheduled for Tuesday, 16 April at 12Z. There will be no
change in the forecast grids being disseminated via AWIPS or
Family of Services. A Real-Time Test and Evaluation of the 20 Km
RUC began on 8 March. Test data are available on the NCEP ftp
server at:
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/ruc/para/
and also on the NWS ftp server at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnt/.
The next NCEP quarterly backup test has been scheduled for
the 00Z cycle on 4 April 2002 (1900 EST 03 April 2002). If the
weather situation prohibits this test, it will be attempted at
00Z on 11 April 2002.
A list of the major model implementations planned for 2002
can be found at:
http://www.nco.ncep.noaa.gov/pmb/changes
As additional information about each implementation becomes
available, links will be added on the change summary page.
To unsubscribe from the JIF memo use the link provided at:
http://www.nco.ncep.noaa.gov/pmb/jifmemo/
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