NCEP Synergy Meeting Highlights: February 23, 2009
This meeting was led by Bill Bua and attended by Mike Brennan and Richard Pasch, NHC; Jeff Waldstreicher and Dave Novak, Eastern Region; Geoff DiMego; Ed Danaher, HPC; Steve Weiss, SPC; Stephen Jascourt; Mark Mollner, Western Region; and Vera Gerald, MMAB.
DiMego reported on behalf of NCO. The transition from the old to new computer
systems is keeping both NCO and EMC very busy. Most code is running faster on
the new machine. Global GSI implementation is marred by variability in run time
from cycle to cycle which needs to be resolved, but will become operational on
23 February. This new GSI implementation
includes data from the
computer implementation issues related to insufficient power exist in
2. NOTES FROM EMC
2a. Global Climate and Weather Modeling Branch
No report, beyond the updated GFS/GSI implementation.
2b. Mesoscale Modeling Branch (MMB)
Geoff DiMego reported that the Mesoscale branch is spending most of its resources preparing for 2010 implementations and getting the WRF-NMM code into the North American Environmental Modeling System (NEMS) framework. The new WRF-NMM will be on an Arakawa B grid (different from the current E grid) with 4-km nested forecasts.
The MMB was considering running a 2-km WRF-NMM nest for the SPC spring program, but decided to keep it at about 4-km (similar to in-house runs being performed presently by Matt Pyle at MMB). This will be similar to what WFOs will be looking at operationally in 2010, and Steve Weiss from SPC concurred.
Bugs have been discovered in the WRF-NMM in the non-hydrostatic dynamics (affecting vertical motion fields, but hardly detectable in standard verification scores) and the radiation scheme. Fixes to these are being tested and are expected to be implemented soon, within the moratorium period.
2c. Global Ensemble Prediction System
2d. Gridpoint Statistical Interpolation (GSI) Data Assimilation System
See above on GFS/GSI implementation.
Geoff DiMego reported that the SREF parallel (see previous notes from prior to December 2008 meeting for parallel SREF details) has been running on the power-6 cirrus machine for about 4 weeks. SPC via David Bright has been pulling this data into SPC computers. Discussions are taking place with NCO to have the previous evaluations from before the holiday/computer implementation moratoriums used to support the SREF parallel implementation as soon as possible for this severe weather season. SPC concurred; they believe there is marked improvement in the parallel SREF.
2f. Marine Modeling and Analysis Branch
3. FEEDBACK FROM OPERATIONAL CENTERS/REGIONS
Western Region: None.
an issue related to the
SPC, as previously noted, is happy with the parallel SREF. David Bright has been gathering data from this parallel to calibrate probabilities that will be used as forecast guidance for an SPC experimental enhanced resolution thunderstorm product that will be available in early May.
Eastern Region also wants the SREF to be put on the fast track for implementation.
4. The next Synergy Meeting will be held at 2:30 pm EDT on Monday, 30 March 2009 in room 209, with remote teleconferencing capability.