High-Resolution Rapid Refresh
The High Resolution Rapid Refresh (HRRR), developed by the NOAA Earth Systems Research Laboratory (ESRL), is a real-time, 3-km resolution, hourly updated, cloud-resolving, convection-allowing atmospheric analysis/forecast system run over the Contiguous US. An Alaska HRRR run every 3 hours will be added in NCEP Production in June 2018. Radar data is assimilated in the HRRR every 15 min over a 1-h period, adding further detail to that provided by the hourly data assimilation from the 13km radar-enhanced Rapid Refresh system. The HRRR web site at ESRL has hourly displays of all products produced by the system, documentation, and other information.
HRRR History at NCEP:
- HRRRv1 - 30 Sept 2014
- HRRRv2 - 23 Aug 2016
- HRRRv3 - 12 July 2018
- HRRRv4 - Planned implementation Summer 2020
Official RAP and HRRR graphics from the operational runs can be found at the NCEP Model Analysis and Guidance (MAG) web site.