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  Please read about a potential issue if you acquired daily 2m air temperature files between 8/14/2014 and 11/7/2014.
We have transitioned the data files from netCDF3 to netCDF4-classic format (transition date: Aug 14th).

20th Century Reanalysis

This plot shows the anomalous 500mb geopotential height over the North American Region for the 5 highest PNA index days in the 1950's.

Options to produce plot are using the Daily 20th Century Plotting page

  • geopotential height
  • 500mb
  • 11/22/1954, 1/29/1952, 11/19,1954. 11/23/1954, 2/15/1954
  • Anomalies
  • Map projection: PNA