NCEP North American Regional Reanalysis (NARR), for 1979 to Present

Metadata Updated: February 27, 2019

The North America Regional Reanalysis (NARR) Project is a reanalysis of historical observations using a 32-km version of the National Centers for Environmental Prediction (NCEP) 1993 operational ETA model and ETA data assimilation system (EDAS). The objective is to create a long-term set of consistent climate data on a regional scale for the North American domain. The domain of analyses includes North and Central America as well as small parts of the United Kingdom, Eastern Asia, South America, and areas of the Pacific and Atlantic Oceans. The period of the reanalyses is from October 1978 to the present and analyses were made 8 times daily (3 hour intervals). Horizontal boundary conditions are derived from the NCEP/DOE Global Reanalysis. Advantages over the widely used NCEP/NCAR Reanalysis (180 km) are its higher spatial and temporal resolutions (32 km grid, 45 vertical layers, every three hours) and better treatment of the land surface. This is achieved through the use of a better land-surface model (Noah LSM), the assimilation of more observational data (precipitation, upper air and surface winds), and through a better representation of the terrain (heights, vegetation, soil type). This data set contains "conventional" atmospheric analyses as well as model-derived fields that contain estimates of subsurface, surface, and radiative properties. This data set is encoded in WMO GRIB format version 1 using the NCEP GRIB table 131. The model used a native, "E-grid" for its calculations, however data were interpolated to a Lambert Conformal Conic projection, also known as NAM 221 AWIPS Grid - High Resolution North American Master Grid (32-km Resolution). All vector components are earth relative rather than grids relative which is the convention for operational NCEP model. The list of fields produced by the NARR ETA model differ from the operational ETA model. NARR data files that are compatible with the Grid Analysis and Display System (GrADS) are available.

Access & Use Information

Downloads & Resources


Metadata Date November 5, 2018
Metadata Created Date September 27, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) January 1, 2004 (publication)
Frequency Of Update monthly

Metadata Source

Harvested from NOAA CSW Harvest Source

Graphic Preview

North American Regional Reanalysis (NARR) grid domain

Additional Metadata

Resource Type Dataset
Metadata Date November 5, 2018
Metadata Created Date September 27, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) January 1, 2004 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long -5.0
Bbox North Lat 85.0
Bbox South Lat 8.0
Bbox West Long -150.0
Coupled Resource
Frequency Of Update monthly
Graphic Preview Description North American Regional Reanalysis (NARR) grid domain
Graphic Preview File
Graphic Preview Type GIF
Guid gov.noaa.ncdc:C00618
Harvest Object Id 04d0912e-2344-41ed-80f2-fe3e85997e2c
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1978-10-01

Didn't find what you're looking for? Suggest a dataset here.