We have transitioned the data files from netCDF3 to netCDF4. As a result, the files are compressed instead of being packed with a scale and offset. As with any netCDF4 file, the user interface will perform the uncompression. We expect the files to be read faster, depending on the application you are using. Please let us know if you run into any issues.

20th Century Reanalysis V2

This plot shows a profile of temperature on May 18 1925 near 37.7N, 270.77E (Tri-State tornado).

Options to produce plot are using the Vertical Profile Page

  • Select: variable: air temperature and dewpoint
  • Select: top level: 100mb
  • Select: date: 1925 May 18 18Z
  • Select: dataset: 20CR
  • Select: latitude: 37.7 (near Jackson Illinois)
  • Select: longitude: 270.77 (near Jackson Illinois)

vertical profile plot