Tidal estuaries are very dangerous. The wind
isn't as dangerous as the tremendous current
that can run 20-30kts with increases of depth
of 30+' during the torrential rains of a cyclone in Australia. "
I'm not sure where you are getting your information, or whether you are confusing a short mangrove creek with the Bay of Fundy, but 20 to 30 knot
currents in the locations shown by Cat are simply not possible.
As some one else has mentioned, mangrove creeks are the anchorages
of choice in Oz during cyclones, and hundreds of boats have used them successfully over the years.
For hydrographic reasons that I don't quite understand, the east coast
of Australia does not seem to suffer the huge storm surges that are common on the US east/Gulf coasts. The flooding that you mention was on the Brisbane River which drains a reasonably large catchment, and the city is, of course, a number of miles upstream from Moreton Bay. So, mate, to equate the Brisbane floods with anchoring
in the creeks suggested by Cat is kinda silly.
But, one should beware of floods on rivers. We sat through a minor one on the Clarence last year, and it was pretty exciting. Not so much from the current
, which ran about 6 knots at max, but all the stuff that came down on it. Huge piles of vegetation kept building up on the rode
and the bow, and the increased drag overpowered the anchor
a few times. We learned a lot!
Jim and Ann s/v Insatiable II