There is a general misunderstanding among many in relation to 'global warming' [a.k.a. climate change] that increased rainfall and increased / unseasonal snow falls 'disprove' the theory.
In reality, greater variation in weather patterns may just be a symptom of change.
Having said that, there are records of paddle steamers sailing 'overland' in New South Wales in the 19th century during large floods - these trips were predominantly, but not always, along normally dry creeks. (So perhaps the current falls are not entirely unprecedented.)
e.g.
The
P.S. Princess Royal, 60 miles along the 'previously uncharted' Talyawalka Creek (an annabranch of the Darling River).
P.S. Pioneer: Once during a heavy flood it
left the Talyawalka Creek and
set out overland on a journey during which
the skipper at one stage did not see land for more than six hours.
P.S. Pilot: One of the slowest boats on the river ... owner - skipper
would often leave the rivers to deliver or pick up cargo. ... on one ... occasion he
journeyed many miles overland to a location that demanded well over 30 feet of water in the Darling or he was truly stranded.
(Info from
Paddle Boats of the Murray Darling River System, by Brian Marshall ISBN 0 7316 2941 8, if anyone is interested.)
Perhaps the more things change, the more they stay the same.
Us white fellas really haven't been on this continent anywhere long enough to
understand it, just long enough to love it!.