On 10 Oct 2005 08:25:41 GMT, Richard Dixon
wrote:

"Stuart Robinson" wrote in
:

Also to note.... in Europe we base our sustained wind speeds on a 10
minutes average - were for hurricanes it is taken for 1 minute
average. So by Euro standards this would not have hurricane force
winds (just below in fact)

I will be interesting to see what the (10 min) sustained winds that are
reported on the Portugese coast.

There's typically a 0.88 factor* between the 10-min and 1-min sustained
winds so any sustained wind reports of 56 knots or greater reported in
Portugal would be around the 1-minute "NHC" sustained hurricane force.

Richard

* I usually refer to section 2.2 for sustained wind conversion:
http://www.nrlmry.navy.mil/~chu/chap6/se200.htm

I agree; the Saffir-Simpson scale uses the one minute mean wind speed
so, when deciding if this system was or was not a hurricane, European
agencies should convert any measured 10 minute wind speeds to the one
minute mean - not the other way round.

--
Dave