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GSD receives NWS approval for full implementation of the RAPv5/HRRRv4

February 11, 2020


GSD has received science approval from the NOAA National Weather Service (NWS) to proceed with full operational implementation of the 13km Rapid Refresh version 5 and the 3km High-Resolution Rapid Refresh version 4 weather prediction models by mid-2020. This decision was made on Friday, December 20, 2019, after a period of stakeholder feedback including many positive comments from NWS field offices and national centers.

The scope of the implementation includes coupling to a model with lake hydrodynamics to improve forecasts in the Great Lakes region, a module that produces wildfire-driven smoke forecasts and predictions of the impact of smoke on the weather, and storm-scale ensemble data assimilation. The code has also been optimized to produce a 48-hour forecast in the same amount of time as it previously took to produce a 36-hour forecast.

This final configuration of these RAP/HRRR model systems will serve as an operational baseline for the transition to a regional convection-allowing application in the Unified Forecast System, known as the Rapid Refresh Forecast System (RRFS).

Congratulations to the team of people who have contributed to this success!

Data Assimilation
Curtis Alexander, Amanda Back, Stan Benjamin, David Dowell, Jeff Duda, Guoqing Ge, Ming Hu, Eric James, Terra Ladwig, Haidao Lin, Steve Weygandt
Model Physics/Chemistry
Ravan Ahmadov, Hannah Barnes, Stan Benjamin, John Brown, Georg Grell, Siwei He, Jaymes Kenyon, Joe Olson, Tanya Smirnova, Mike Toy, Greg Thompson (NCAR)
Model Assessment/Verification
Trevor Alcott, Jason English, Venita Hagerty, Jeff Hamilton, Brian Jamison, Bill Moninger, Randy Pierce, Molly Smith, Bonny Strong, Ed Szoke, Dave Turner
Retrospectives Execution/Data Flow
Trevor Alcott, David Dowell, Jason English, Eric James, Jaymes Kenyon, Terra Ladwig, Bob Lipschutz, Josh Weber
WCOSS Parallel Maintenance and Support
David Dowell, Ming Hu, Sam Trahan
Curtis Alexander, Melinda Marquis

For more information contact: Susan Cobb 303-497-5093