Content-Length: 34930 | pFad | http://www.wpc.ncep.noaa.gov/synergy/08-25-08_final.htm
NCEP Modeling Synergy Meeting
Highlights: August 25, 2008
This meeting was led by Mike Brennan and
attended by Ken Campena, Geoff DiMego, Shawna Cokley, Dan Starosta, Bill Bua,
Joe Sienkiewicz, Keith Brill, and Yuejian Zhu. Stephen Jascourt of UCAR/COMET,
Steve Silberberg of AWC, David Bright of SPC, Rusty Billingsley of Southern
Region, and Jeff Waldstreicher of Eastern Region attended by remote
teleconference.
1. NCO
Dan Starosta of TOC was
introduced. He will serve as the acting head of the Production Management
Branch for the next few months.
Shawna
Cokley of NCO reported on several upcoming implementations:
·
A minor GEFS
implementation will occur after the Critical Weather Day (CWD) is lifted
·
Parallel
evaluation of the RTMA for
·
A RUC
implementation is scheduled for early October
·
A SREF
implementation has been pushed back to late October with a parallel beginning
in September
·
Minor changes to
the GSI are scheduled to be implemented in the next couple of weeks
Shawna
noted that the usual December “holiday” change moratorium will last through
April 2009 due to the implementation of the new supercomputer.
A
detailed list of all upcoming major upgrades and implementations can be found here.
2. NOTES FROM EMC
2a.
Global Climate and Weather Modeling Branch
A
new upgrade package for the GFS is tentatively scheduled for implementation in
April 2009. This package contains changes that were included in the previous
GFS upgrade that was not implemented as well as coupling with an ocean model (GFDL
Modular Ocean Model version 4, or MOM4). This package also includes the new GSI
that is awaiting implementation.
EMC is looking for early feedback from HPC and OPC on these changes in October,
particularly for the retrospective covering the spring 2008 period when the
package tested previously performed poorly.
2b.
Mesoscale Modeling Branch
Geoff
DiMego said that the evaluation of the RTMA for
MMB
will be delivering code changes for the
In
FY09, no further upgrades will be made to the
2c.
Global Ensemble Prediction System
Yuejian
Zhu reported on several upcoming changes to the Global Ensemble Forecast System
(GEFS) and North American Ensemble Forecast System (NAEFS):
A
GEFS upgrade is scheduled to be delivered to NCO in early September and includes
the following changes:
Also,
there is a plan to increase the number of variables exchanged between NCEP and
CMC for the NAEFS to 78 from the current 52. This will require a 75-day notice
of change because it will affect the pgrb_a files.
Work
is underway to finalize the downscaling of NAEFS output for
A
1-year evaluation period of the FNMOC ensemble system is underway for possible
inclusion in the NAEFS. This evaluation is being hindered by transfer problems
between FNMOC and NCEP. If the evaluation is positive, an additional year will
be taken to implement the FNMOC ensembles into the NAEFS.
An
analogous 2-year effort to evaluate and implement the ECMWF ensembles into the
NAEFS is planned. However, there are data processing problems with the 00 UTC
ensemble cycle that must be resolved first.
2d.
Geoff
DiMego reported that last minute changes to the SREF implementation resulted in
code and script changes that are currently being worked on, but will delay the
parallel evaluation and implementation. These changes include hourly output
through forecast hour 39 at the request of AWC and SPC.
2e.
Marine Modeling and Analysis Branch
No
report.
3. FEEDBACK FROM OPERATIONAL CENTERS/REGIONS
HPC
Mike Brennan voiced concerns about the potential
large number of back-to-back or potentially overlapping parallel evaluations
coming up, including the SREF,
AWC
Steven
Silberberg re-iterated the above concerns, noting that AWC would also
participate in the evaluation of the RUC as well. He also mentioned data volume
issues on their end, due to the large amount of hourly RUC data they receive in
various formats (GEMPAK, grib, and grib2) for in house use and for product
generation for the FAA.
4. The next Synergy
Meeting will be held Monday, September 29, 2008, at 12:00 pm EDT in Room 209 at
EMC, with remote conference capability.
Fetched URL: http://www.wpc.ncep.noaa.gov/synergy/08-25-08_final.htm
Alternative Proxies: