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SPC Evaluation: Steve Weiss
After using the WRF-NMM4 in operational severe weather forecasting for more than three years, the SPC strongly supports upgrading the High Res Window slot with the latest versions of the WRF-NMM4 and WRF-ARW5, and running them twice daily at 00z and 12z over an expanded central/east region, and once daily at 06z over an expanded west/central region.
Recommendation: Implement as proposed XXX*
* The need for hourly grids “slipped through the cracks” for the HRW upgrade, as we had assumed that the hourly output frequency of Matt Pyle’s experimental run would automatically transfer to the HRW. We agree with the advice of NCO to implement the proposed version in September and then provide hourly grids early in FY08. We are concerned, however, that with the approach of the secondary fall severe weather season over the southeast/Ohio Valley region from late October into December, there may be a need to continue Matt’s experimental run until the hourly grids can be implemented in the HRW. This has been discussed in several email exchanges earlier today with Brent Gordon.
EMC has agreed to continue running Matt Pyle’s experimental run with hourly output until this capability can be added to the Production run.