Gosh this is fun… you wait ages for a paper on a warm event and then 2 come along together :-).
Anyway, thanks to FB for pointing out How unusual was autumn 2006 in Europe? in Climate of the Past. This is almost but not quite the same thing as the 2003 event so I had all the code ready and submitted a little comment. Since its on-line open access you can see it, just click on the interactive discussion.
Looking in the Chase et al. style hemispheric context, 2006 doesn’t look so unusual, even when looking at T1.5m.