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NCEP North American Regional Reanalysis (NARR)


The NCEP North American Regional Reanalysis products are on the Eta 221 grid at 29 pressure levels. They were produced using the Eta 32 km model with 45 vertical layers. The input data includes all observations used in NCEP/NCAR Global Reanalysis project, and additional precipitation data, TOVS 1B radiances, profiler data, land surface and moisture data, etc. The output analyses are 3-hourly with additional 9 variables in the 3-hour forecasts to reflect accumulations or averages.

NARR reruns from 20090311 to 20091214 are updated on February 4, 2010. In April 2015, NCEP has released rerun 4 from April 1, 2009 to January 31, 2015 to fix codes and Mexico precipitation data preparation.

See NCEP's NARR Frequently Asked Questions

Temporal Range:
1979-01-01 00:00 +0000 to 2024-07-01 00:00 +0000 (Entire dataset) Period details by dataset product
Air Temperature Albedo Canopy Characteristics Cloud Base Pressure
Cloud Frequency Cloud Liquid Water/Ice Cloud Top Pressure Dew Point Temperature
Evaporation Freezing Rain Geopotential Height Heat Flux
Humidity Hydrostatic Pressure Longwave Radiation Planetary Boundary Layer Height
Potential Temperature Precipitation Amount Precipitation Rate Rain
Runoff Sea Level Pressure Shortwave Radiation Skin Temperature
Snow Snow Cover Snow Depth Snow Melt
Snow Water Equivalent Soil Moisture/Water Content Soil Temperature Surface Pressure
Surface Winds Total Precipitable Water Tropopause Upper Air Temperature
Upper Level Winds Vegetation Cover Vertical Wind Velocity/Speed Water Vapor
Wind Shear
GRIB parameter table: HTML | XML
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Spatial Coverage:
Longitude Range: Westernmost=148.64E Easternmost=2.568W
Latitude Range: Southernmost=0.897N Northernmost=85.333N Detailed coverage information
Data Contributors:
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Total Volume:
15.72 TB (Entire dataset) Volume details by dataset product
Data Formats:
More Details:
View a more detailed summary of the data, including specific date ranges and locations by parameter
Metadata Record:
Data License:
Citation counts are compiled through information provided by publicly-accessible APIs according to the guidelines developed through the project. If journals do not provide citation information to these publicly-accessible services, then this citation information will not be included in RDA citation counts. Additionally citations that include dataset DOIs are the only types included in these counts, so legacy citations without DOIs, references found in publication acknowledgements, or references to a related publication that describes a dataset will not be included in these counts.