HRRR Home Info Page
Current and Forecast Graphics
HRRR Configuration Info
CONUS-HRRR domain parms
HRRR static fields inc lat/lon (NetCDF-952 MB)
WFIP-HRRR domain
CONUS-HRRR terrain info
HRRR WPS Namelist
HRRR WRF Namelist
HRRR GRIB2 Table 2-D Hourly
HRRR GRIB2 Table 2-D 15 min
HRRR GRIB2 Table Native
HRRR GRIB2 Table Press
HRRR-NCEP GRIB2 Table 2-D Hourly
HRRR-NCEP GRIB2 Table 2-D 15 min
HRRR-NCEP GRIB2 Table Native
HRRR/RAP diagnosis of output fields
Rapid Refresh web page
RUC GRIB viewer
HRRR/RAP forum
HRRR Status
HRRR Status
HRRR Status (Past 24 hrs) HRRR Dev1 Status
HRRR Dev1 Status (Past 24 hrs)
HRRR Dev2 Status
HRRR Dev2 Status (Past 24 hrs)
RAP Dev1 (HRRR Dev1 Parent)
HRRR Convective Probabilities
Interactive (Java)
Other Products
NCEP Model Products (GFS,etc.)
Assim Dev Branch/GSD Staff
Modeling Dev Branch/GSD Staff
HRRRv3/RAPv4 changes Jun17
HRRR Home Page
HRRR-Smoke info
NWS Discs Using HRRR
HRRR ChangeLog
HRRRdev ChangeLog
RUA ChangeLog
HRRR-TLE ChangeLog
HRRR-Alaska ChangeLog HRRR-Hawaii ChangeLog
Other Information
NCEP ftp access to HRRR data
NCEP product status
NCEP obs processing
NWS-TOC status
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The High-Resolution Rapid Refresh (HRRR)

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The HRRR is a NOAA real-time 3-km resolution, hourly updated, cloud-resolving, convection-allowing atmospheric model, initialized by 3km grids with 3km radar assimilation. 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 .

HRRR Colorado Labs Award video - a 2-minute layperson-level description on the HRRR from late 2015 and why it is important.

The experimental version HRRRv3 of the HRRR model has been run in real-time at NOAA/ESRL since April 2017.
HRRRv3/RAPv4 description and testing - June 2017 . Key features: improved mesoscale environment for convective storms and clouds.

The operational version of the HRRR (currently HRRRv2) was implemented at NCEP 23 Aug 2016. NOAA/NWS Technical Information Notice (TIN) on RAPv3/HRRRv2 changes

The experimental HRRR is run by NOAA/ESRL/GSD as a real-time demonstration of advanced versions of the HRRR, ahead of the NCEP operational version. Experimental versions of the HRRR started to run in 2010 and from October 2014 onward, continuing to run more advanced versions than the NCEP operational version but with slightly lower reliability. Usually yearly upgrades are made at ESRL.

HRRRv2 physics description in Benjamin et al. 2016, A North American Hourly Assimilation and Model Forecast Cycle: The Rapid Refresh. Mon. Wea. Rev., 144, 1669-1694.

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