udunits(3): Invalid integer udunits(3): Invalid integer HTTP/1.0 200 OK Date: Fri, 17 Jul 2026 11:18:04 GMT Server: Ingrid 0.9 MIME-version: 1.0 Access-Control-Allow-Origin: * Cache-Control: public Content-Type: text/html; charset=utf-8 Last-Modified: Tue, 17 Jul 2018 19:54:57 GMT Vary: Cookie Where are the monthly NAO data in columnar format?

Where are the monthly NAO data in columnar format?

Monthly NAO data from Jan 1950 to Dec 2001 can be found here

/SOURCES/.NOAA/.NCEP/.CPC/.Indices/.NHTI/.NAO/

If you click on "Tables" in the table at the top of the page, you can then choose "columnar table".

-- Michael Bell