Re: hurricane winds forecast
- From: Weatherlawyer <Weatherlawyer@xxxxxxxxxxx>
- Date: Thu, 31 Jan 2008 05:09:20 -0800 (PST)
On Jan 31, 10:18 am, Mike Tullett
<mike.tullett1.for.newsgro...@xxxxxxxxxxxx> wrote:
On Thu, 31 Jan 2008 09:50:54 +0000 (GMT), Dave Liquorice wrote in
<news:nyyfbegfubjuvyypbz.jvijwu0.pminews@xxxxxxxxxxxxxxxx>
Hurricane force 13 is the strongest I've seen, (actually heard, it was
pre internet).
13? The beaufort scale only goes up to 12..
"The Beaufort scale was extended in 1944, when Forces 13 to 17 were added.
Hitherto, Force 12 (Hurricane) had been the highest point on the scale,
referring to a sustained wind speed of 64 knots (32.7 m/s) or more - that
is, the wind speed averaged over a period of 10 minutes."
"George Simpson devised a scale for land-based observers in 1906.
Similar in concept to the scale used by the Palatine Meteorological
Society, it has subsequently been altered very little."
Seehttp://www.metoffice.gov.uk/education/secondary/students/beaufort.html
Not to be confused with Bob Simpson of the Saffir Simpson scale:
"The way I got into the hurricane scale, is back in the '70s I had a
commission from the United Nations, of all people. They wanted a study
on low-cost housing throughout the world that was subject to tropical
cyclones, hurricanes.
They're the same in India and Australia and Japan and Korea and South
Florida, even though they all have different names. And that's when I
got into setting forth rules for buildings, small buildings,
residential buildings, and I also set up the hurricane scale because
there was no scale that corresponded to the earthquake scales.
The scale that I set up was based on the possible structural damage
that you could have from each category of storm going from 75 mph,
which was the minimum type of storm, up to 155 mph. I gave the scale
to the National Hurricane Center for their use. Bob Simpson, who was
the director of the hurricane center at the time, added a possible
tidal surge, storm surge, possible flooding for each category."
http://www.novalynx.com/saffir-interview.html
Interesting convergence there.
Maybe the MetO would oblige us with their version of the hurricane
scale?
"The additional five points extended the scale to 118 knots (61.2 m/
s), with Force 12 referring only to speeds in the range 64 to 71 knots
(32.7-36.9 m/s).
However, Forces 13 to 17 were intended to apply only to special cases,
such as tropical cyclones. They were not intended for ordinary use at
sea - indeed, it's impossible to judge Forces 13 to 17 by the
appearance of the sea.
For all normal purposes, the Beaufort scale extends from Force 0
(Calm) to Force 12 (Hurricane), with Force 12 defined as a sustained
wind of 64 knots (32.7 m/s) or more."
"Saffir-Simpson Scale
Category One Hurricane: 64-82 knots,
74-95 mph,or 119-153 km/hr.
Category Two Hurricane: 83-95 knots;
96-110 mph, or 154-177 km/hr.
Category Three Hurricane: 96-113 knots;
111-130 mph, or 178-209 km/hr.
Category Four Hurricane: 114-135 knots;
131-155 mph, or 210-249 km/hr.
Category Five Hurricane:
Winds greater than 135 knots;
155 mph, or 249 km/hr.
http://www.nhc.noaa.gov/aboutsshs.shtml";
.
- References:
- hurricane winds forecast
- From: Mike McMillan
- Re: hurricane winds forecast
- From: Dave Liquorice
- Re: hurricane winds forecast
- From: Mike Tullett
- hurricane winds forecast
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