Home
Teleconnections
Arctic Oscillation North Atlantic Oscillation Pacific/North American Pattern Teleconnection Text Files
Tropical Waves
Madden Julian Oscillation Static Hovmollers Static Hovmollers dProg/dt Interactive Hovmollers Hovmoller Archive Horizontal Maps
CFS Forecasts Map Help Wave Tutorial
Alert: As of 9 March 2026, this old website has stopped updating. This is due to the transition from CDAS to CORE, which is scheduled for mid-March. You can read more about it here. My new site has been updated to use CORE and should continue uninterrupted.

This is the old version of the website, which was sunset in early 2026. You can access this site from old.kylemacritchie.com for about another month until I turn off this machine. The new site can be found at www.kylemacritchie.com.

Arctic Oscillation | North Atlantic Oscillation | Pacific/North American Pattern

Note that since the PNA is most variable in the winter and weakly variable in the summer, my index will correlate best with CPC during the winter months. This is okay, though, since the PNA during the summer is rather useless. Because of this, my index shows a weaker amplitude PNA during the summer than does CPC.

 

Loading Pattern: