Reanalysis
A 3-D animated image of Reanalysis-2 data for the first ten days of July 1979, in six-hourly intervals. This animation shows a constant 100mph 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 zero degrees Celsius 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 (IDV) combined with ImageMagick.
The following reanalysis datasets are available through NOMADS:
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Climate Forecast System Reanalysis and Reforecast (CFSRR)
CFSRR provides both a global reanalysis (a best estimate of the observed state of the atmosphere) and a global reforecast of past weather down to 0.5 degree horizontal resolution. -
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 32km horizontal resolution. -
Reanalysis-1 / Reanalysis-2
Reanalysis-1 / Reanalysis-2 are two global reanalyses of atmospheric data spanning 1948/1979 to present at a 2.5 degree horizontal resolution.



