Without digging very deep I can't quote any specific examples but I
agree that it is not unusual for extreme events to occur fairly close
together
An example might be the two storms that struck France in 1999,there the common factor was the
straight, fast jet that persisted over the N Atlantic somewhat like last weekend.I believe it's been
mooted that the disturbance associated with the most devestating storm 'Lothar' was triggered by
large scale convection in the west Pacific.
Tropical or sub tropical disturbances are thought to promote Rossby wave trains that propagate via
the jet stream and cause remote synoptic disturbances or sequences of such. eg
http://ams.confex.com/ams/84Annual/t...aper_74456.htm

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regards,
david
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