Reanalysis
![A 3–D animation of Reanalysis-2 data for the first 10 days of July 1979, in six-hourly intervals. A 3–D animation of Reanalysis-2 data for the first 10 days of July 1979, in six-hourly intervals.](https://webarchive.library.unt.edu/web/20170124170713im_/https://www.ncdc.noaa.gov/sites/default/files/Reanalysis-2%20-%2019790701-10_isoT_isoSpd_Flow.gif)
A 3–D animated image of Reanalysis-2 data for the first 10 days of July 1979, in six-hourly intervals. This animation shows a constant 100 mph wind speed surface in red. (Note the stronger, more widespread, polar jet stream in the Southern Hemisphere—this is July, during the southern winter.) A cyan-colored, constant temperature sheet of 0°C ripples across the globe, showing the freezing level. Near-surface wind flow is denoted by white flowlines. This image was generated with plots from Unidata's Integrated Data Viewer combined with ImageMagick.
The following reanalysis datasets are available through NOAA's National Operational Model Archive and Distribution System (NOMADS).
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Climate Forecast System Reanalysis (CFSR)
CFSR provides a global reanalysis (a best estimate of the observed state of the atmosphere) of past weather from January 1979 through March 2011 at a horizontal resolution of 0.5°. -
North American Regional Reanalysis (NARR)
NARR is a regional reanalysis of North America containing temperatures, winds, moisture, soil data, and dozens of other parameters at 32 km horizontal resolution. -
Reanalysis-1 / Reanalysis-2
Reanalysis-1 / Reanalysis-2 are two global reanalyses of atmospheric data spanning 1948/1979 to the present at a 2.5° horizontal resolution.