Some PSD datasets and products are not up-to-date due to a system problem. We are working on a fix.
  We have transitioned the data files from netCDF3 to netCDF4-classic format. 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 the anomalous SLP for 5 composites hot July days in New York City.

Options to produce plot are using the Sub-Daily Composites 20th Century V2 Plotting page

  • SLP
  • Jul-Jul
  • 7/11/1911,7/21/1977,7/3/1966,7/19/1977,7/15/1975
  • Anomalies
  • Map projection: USA