http://129.13.102.67/wz/pics/brack4a.gif

I see the 564 line is heading for the Outer Hebrides from the west!

I see the 564 line is heading for the Outer Hebrides from the west!

More significant, I would have thought, is that it is forecast to
penetrate Iceland. But it's only a 132-hr chart, remember.

Tudor Hughes, Warlingham, Surrey.

Trevor Appleton wrote:
http://129.13.102.67/wz/pics/brack4a.gif

I see the 564 line is heading for the Outer Hebrides from the west!



Please explain to us mere mortals the meaning of this.

Thanks,

John

564 decametres is the height at which the pressure falls to 500 mb (or Hp)
....strictly speaking the thickness depth between the height of the 1000mb
and 500mb pressure surfaces. Warm air is less dense than cold air so if the
500 mb pressure level is relatively high it suggests that the airmass (
between 1000 and 500 mb anyway) is warm and it may be time to get the sun
cream out. A thickness value of 564 is relatively infrequent.
Cheers
--
York,
North Yorkshire.
(Norman Virus Protected)

"John Smith" wrote in message
...
Trevor Appleton wrote:
http://129.13.102.67/wz/pics/brack4a.gif

I see the 564 line is heading for the Outer Hebrides from the west!



Please explain to us mere mortals the meaning of this.

Thanks,

John

...also of note is the 582 DAM TT moving north over southern Spain.

http://imkpc3.physik.uni-karlsruhe.de/pics/brack3a.gif

My aunt near Alicante told me the local radio was talking about an impending
heatwave, to which I replied someone along the lines of "how will you know
?" !

Jon.

"John Smith" wrote in message
...
Trevor Appleton wrote:
http://129.13.102.67/wz/pics/brack4a.gif

I see the 564 line is heading for the Outer Hebrides from the west!



Please explain to us mere mortals the meaning of this.

Also see :- http://homepage.ntlworld.com/booty.weather/tthkfaq.htm

Jon.

...also of note is the 582 DAM TT moving north over southern Spain.

http://imkpc3.physik.uni-karlsruhe.de/pics/brack3a.gif

My aunt near Alicante told me the local radio was talking about an impending
heatwave, to which I replied something along the lines of "how will you know
?" !

Jon.

It won't last, I'm on my way next week :-)

Seriously thought I notice the 982 dam is very close to Spain later
this week and over the weekend.

Keith (Southend)

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********************************
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http://www.wunderground.com/weathers...p?ID=IESSEXSO1
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On Wed, 21 Jul 2004 12:45:45 +0100, "Jon O'Rourke"
wrote:

..also of note is the 582 DAM TT moving north over southern Spain.

http://imkpc3.physik.uni-karlsruhe.de/pics/brack3a.gif

My aunt near Alicante told me the local radio was talking about an impending
heatwave, to which I replied something along the lines of "how will you know
?" !

Jon.

"Keith (Southend)" wrote in message
...
It won't last, I'm on my way next week :-)

Seriously thought I notice the 982 dam is very close to Spain later
this week and over the weekend.

Gee, we're talking about a major heatwave then!! ;-)

Yannis

Expect the hottest summer spell for the uk over the next two weeks.
This happened last year when I was away :-0

Keith (Southend)

********************************
'Weather Home & Abroad'
http://www.southendweather.net
********************************
COL Station for Southend-on-Sea
http://www.wunderground.com/weathers...p?ID=IESSEXSO1
********************************
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On Wed, 21 Jul 2004 23:58:09 +0300, "Yannis"
wrote:

"Keith (Southend)" wrote in message
.. .
It won't last, I'm on my way next week :-)

Seriously thought I notice the 982 dam is very close to Spain later
this week and over the weekend.

Gee, we're talking about a major heatwave then!! ;-)

Yannis