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 V2

This plot shows the anomalous cold for the US Jan 1912.

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

  • air temperature
  • 1000mb
  • January 1 1912 (0,6,12,18z)
  • Means
  • Map projection: custom 40-55N; 250-270E.