Some links if you don't already have them.

http://www.ghcc.msfc.nasa.gov/GOES/s...satellite.html


http://www.wtsp.com/weather/doppler/doppler_stream.asp

http://www.flamedia.com/lightning/light.htm


"Les Crossan" wrote in
message . uk...
Tropical cyclones aren't normally my style but this one seems fairly
remarkable for June - must be all the GW or earthquake activity in the
Marianas Trench. Irony aside:

The intellicast radar is showing the rain bands up a treat. Check Florida.
From various sources:

Dennis is now the strongest-ever July Hurricane in the Atlantic Basin
(current central Pressure being 27.76"/940mb-hPa). This is only the
4th-ever Major (cat 3+) Hurricane in the Atlantic Basin in July.
Around 40 or so people are going to ride out the storm in the (WW2-era)
USS Alabama warship, moored in Mobile Bay, Alabama.
Hurricane Warnings currently in effect from Steinhatchee River, Florida,
Westwards to Pearl River on the Louisiana/Mississippi border.
Florida, Louisiana, Mississippi and Alabama have all been under States of
Emergency in preparation of landfall.

--

Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

"Les Crossan" wrote in
message . uk...
Tropical cyclones aren't normally my style but this one seems fairly
remarkable for June - must be all the GW or earthquake activity in the
Marianas Trench. Irony aside:

The intellicast radar is showing the rain bands up a treat. Check Florida.
From various sources:

Dennis is now the strongest-ever July Hurricane in the Atlantic Basin
(current central Pressure being 27.76"/940mb-hPa). This is only the
4th-ever Major (cat 3+) Hurricane in the Atlantic Basin in July.
Around 40 or so people are going to ride out the storm in the (WW2-era)
USS Alabama warship, moored in Mobile Bay, Alabama.
Hurricane Warnings currently in effect from Steinhatchee River, Florida,
Westwards to Pearl River on the Louisiana/Mississippi border.
Florida, Louisiana, Mississippi and Alabama have all been under States of
Emergency in preparation of landfall.

This place looks like getting a direct hit -

http://weather.noaa.gov/weather/current/KNPA.html

Joe

Weather Underground links...

http://www.wunderground.com/weathers...p?ID=KFLVALPA1

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

"Les Crossan" wrote in
message . uk


Michael Mcneil never wrote any of this:

"Martin Rowley" m wrote
in message
http://www.booty.org.uk/booty.weather/FAQ/3.htm#3.19

Please don't take offense at this, charlie boy but haven't I spoken to
you before about newsgroup etiquette?

Can someone send him a book on the subject please?

If I remember what my question was, the idea I couldn't get my mind
around was that the ratio was 1.3 earth radii.

Where did that come from?

Your answer (top posted (but who am I to carp?)) was:

An Informed Guess.. all radio waves are bent in the atmosphere the same
way as light bends through glass or water, the higher frequencies are
bent less but at the frequencies used there must still be enough useable
return signal at a third more distance than expected.

I may be mad, I am certainly drunk but I am not thick!!!

But now I am under the influence once more, so until I can find someone
who likes a good savaging from a Fostersmonger, I'll hold fire.

....whuwozzer qestuiwun'-yway?




--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG

FOX News, Sky Channel 531 has live coverage of Dennis.

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

Keith (Southend) wrote:
FOX News, Sky Channel 531 has live coverage of Dennis.


10mph off being a CAT 5 storm (Fox News)

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

Keith (Southend) wrote:
Weather Underground links...

http://www.wunderground.com/weathers...p?ID=KFLVALPA1


1.84 inches in the last hour.
987.0mb Falling fast.

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

I didn't actually write the entry in the FAQ for this subject, but it
seems to cover the basics when compared with other sources I have here.

As I understand it, the concept of 'dielectric constant' is an attempt
to describe the 'normal' behaviour of radio transmissions through the
atmosphere under average conditions of pressure, temperature and
humidity.

The density of the air decreases with increasing altitude, encouraging
radio wave-fronts leaving a transmitter to 'bend' towards the earth -
the portion of the wavefront passing through less dense air moving
faster than the portion nearest the earth's surface.

Greater than a certain angle with the earth's surface and the
elecro-magnetic (em) energy is attenuated so much that no detectable
signal (on the ground) is found, no matter how much 'bending' occurs.
Less than a critical angle, and the em energy bends sufficiently to be
found up to approximately one-third greater distance than the
theoretical visual horizon.

I believe the idea of 'one-third' was originally an empirical finding
dating back to the earliest days of wireless transmissions. Of course,
variations in temperature and humidity (particularly the latter) alter
the profile of air density, and lead to super- and sub-refraction and
the special case of ducting - which is the subject of the FAQ entry.



Martin.



--
FAQ & Glossary for uk.sci.weather at:-
http://homepage.ntlworld.com/booty.weather/uswfaqfr.htm
[ with Search facility ]
and
http://booty.org.uk/booty.weather/metindex.htm

I may be mad, I am certainly drunk but I am not thick!!!

But now I am under the influence once more, so until I can find someone
who likes a good savaging from a Fostersmonger, I'll hold fire.


My policy is never to post 'late at night' .
What may seem amusing or intelligent at the time, the next day, it may be
rather embarrassing to the sender.
I know, I've been there ;-)

Pete

"Martin Rowley" m wrote
in message

Greater than a certain angle with the earth's surface and the
elecro-magnetic (em) energy is attenuated so much that no detectable
signal (on the ground) is found, no matter how much 'bending' occurs.
Less than a critical angle, and the em energy bends sufficiently to be
found up to approximately one-third greater distance than the
theoretical visual horizon.

I suppose I'll have to take a look at it in a little more detail. I
can't see it being much use to me but it is there. Rather like the idea
that a body moving through space will create Rontgen waves if it moves
into a stellar wind.

That may one day prove to be good news for environmentalists but I don't
think anyone is ready for that yet.

I believe the idea of 'one-third' was originally an empirical finding
dating back to the earliest days of wireless transmissions. Of course,
variations in temperature and humidity (particularly the latter) alter
the profile of air density, and lead to super- and sub-refraction and
the special case of ducting - which is the subject of the FAQ entry.

So that so far as you know it is a coincidental ratio. Just me looking
for patterns that may not be there.

I look at things like this wondering "If God made them, why would he
make them "just so"?" and usually finding a stage of ingenuity that
beggars disbelief.



--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG