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U.S. Department of Commerce | National Oceanic & Atmospheric Administration |
NOAA Research



ASSIMILATION AND VERIFICATION INNOVATION DIVISION (AVID)

 * Projects
   * Rapid Refresh (RAP)
   * HRRR 3km-hourly
   * Global Models
   * Rapid Update Cycle (RUC)
   * WRF-Chem
   * Aircraft Data Web
 * GSL Home
 * ESRL Home

GSL Job Opportunities
RAP Home Info Page
RAP News Items
Current and Forecast Graphics
RAP Plots
RAP Soundings
RAP meteograms - NCEP
Rapid Refresh Chem Plots
RAP-Smoke
3km HRRR CONUS
HRRR-Smoke
3km HRRR-15min
RAP-oper prods fm NCEP
RAPv3 exp prods fm NCEP
COD RAP-NCEP graphics Related RAP info Access to RAP grids
SST for RAP - desc
Snow/Ice @4km - used in RAP/HRRR
RAP domain parameters (updated in 2020 for full domain since RAPv3)
RAP-HRRR-RUC domain map
HRRR-CONUS-AK domains map
HRRR/RAP diag fields-NOAA Tech Memo / NOAA-Lib link
Questions / Announcements GSL regional-model forum
Old RAP/HRRR forum (end 2020) Organization Assim Dev Branch/GSD Staff
Modeling Dev Branch/GSD Staff
ESRL/GSD
Description RAP-ESRL ChangeLog/Info
RAP-ColdStart ChangeLog
RAP-Retro Experiment List
RAP-Chem info Other Information Model-related Forecast Discs
NCEP ftp access to RAP data
Obs counts-NCEP RAP
Obs used-NCEP RAP
GSI minim stats-NCEP RAP
NCEP product status
NCEP obs processing
NWS-TOC status
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RAPID REFRESH (RAP)


Composite reflectivity


Surface Temperature


850 mb Relative Humidity


850 mb Wind


250 mb Wind


The Rapid Refresh is the continental-scale NOAA hourly-updated
assimilation/modeling system operational at NCEP. RAP covers North America and
is comprised primarily of a numerical forecast model and an
analysis/assimilation system to initialize that model. RAP is complemented by
the higher-resolution 3km High-Resolution Rapid Refresh (HRRR) model, which is
also updated hourly and covering a smaller geographic domain.
 * RAPv1 - implemented 1 May 2012 at NCEP (replacing the Rapid Update Cycle -
   RUC )
 * RAPv2 - implemented 25 Feb 2014 at NCEP
 * RAPv3 - implemented 23 Aug 2016 at NCEP
 * RAPv4 - implemented 12 July 2018 at NCEP
 * RAPv5 - implemented 12z Wed 2 Dec 2020 at NCEP
   (run experimentally at GSD since spring 2019)
   Information available in RAPv5/HRRRv4 summary - Jan 2020

NCEP implementations of 3km HRRR version 1 - 30 Sept 2014 version 2 - 23 Aug
2016 version 3 - 12 July 2018 version 4 - IMPLEMENTED 12z Wed 2 Dec 2020
(run experimentally at GSD/GSL since spring 2019)


Complete RAP (v1-v3) description in Benjamin et al. 2016, A North American
Hourly Assimilation and Model Forecast Cycle: The Rapid Refresh. Mon. Wea. Rev.,
144, 1669-1694. Recent RAP/HRRR presentations


* HRRR/RAP July 2016 presentation to NWS

High-Resolution Rapid Refresh (HRRR - 3km)

  HRRR home page / info
* Real-time products from 3km HRRR

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Access to real-time and archive RAP grids NCEP ftp site for real-time RAP data
in GRIB2 format NCEP RAP product inventory NWS/COMET archive of RAP hybrid
(native) grids

U.S. Department of Commerce | National Oceanic and Atmospheric Administration
Earth System Research Laboratories | Global Systems Laboratory
https://rapidrefresh.noaa.gov/Welcome.cgi
Last Modified: 12/17/2020 20:05 UTC
Scientific Contact: Stephen.Weygandt@noaa.gov
Web Contact: webmaster-amb.gsl@noaa.gov