Chalfont St Giles - Thursday 14th July 2005
--------------------------------------------------------------

0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!


Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England

Chalfont St Giles - Thursday 14th July 2005
--------------------------------------------------------------

0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020
RMK: I probably over-estimated the amount of Ci earlier.
24-HR STATISTICS: Max (0900-0900z): 29.7 at 1255z and 1700z
Min (0900-0900z): 14.6 at 0500z
Rain (0900-0900z): Nil


Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England

"Norman Lynagh" wrote in
message
0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020

.... we used to hate mornings/days like this when briefing for RAF
low-level training sorties over northern & Midland England. Although the
'Met Vis' was usually "reasonable", the dense haze extending to some
considerable height used to mean that aircrew found conditions virtually
useless for extended LL flight, particularly when flying towards the sun
(as the earlier sorties would have been). Until the temperatures rose
sufficiently to mix the lower air, an entire morning's training could be
lost, and on some days (and today is a good example), an entire training
package could be aborted. And yet, civil airfields all around us (in
Yorkshire) were reporting ... CAVOK!!

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

On Thu, 14 Jul 2005 09:27:08 GMT, "Martin Rowley"
wrote:


"Norman Lynagh" wrote in
message
0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020

... we used to hate mornings/days like this when briefing for RAF
low-level training sorties over northern & Midland England. Although the
'Met Vis' was usually "reasonable", the dense haze extending to some
considerable height used to mean that aircrew found conditions virtually
useless for extended LL flight, particularly when flying towards the sun
(as the earlier sorties would have been). Until the temperatures rose
sufficiently to mix the lower air, an entire morning's training could be
lost, and on some days (and today is a good example), an entire training
package could be aborted. And yet, civil airfields all around us (in
Yorkshire) were reporting ... CAVOK!!

Martin.


Way back in the mists (pun not intended) of time there used to be an official
pair of Met Office sunglasses obtainable from Met O 1, coloured yellow, for just
such occasions - I found them to be of limited use and always used my own pair
of Polaroid sunglasses for cloud obs.

Martin

I too have always regarded CAVOK as a pretty useless abbreviation, taking no
account of a lot of aviators, especially trainees, whose flight may be
compromised by hazy conditions, vis below 20km say, and meteorologists
whose knowledge of the conditions may be severely curtailed by not knowing
that there was OVCAc070, for instance. Most pilots I have spoken to on this
topic would like the real visibility to be included in all METARS.

--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Martin Rowley" wrote in message
...

"Norman Lynagh" wrote in
message
0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020

... we used to hate mornings/days like this when briefing for RAF
low-level training sorties over northern & Midland England. Although the
'Met Vis' was usually "reasonable", the dense haze extending to some
considerable height used to mean that aircrew found conditions virtually
useless for extended LL flight, particularly when flying towards the sun
(as the earlier sorties would have been). Until the temperatures rose
sufficiently to mix the lower air, an entire morning's training could be
lost, and on some days (and today is a good example), an entire training
package could be aborted. And yet, civil airfields all around us (in
Yorkshire) were reporting ... CAVOK!!

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

Chalfont St Giles - Thursday 14th July 2005
--------------------------------------------------------------

0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020
RMK: I probably over-estimated the amount of Ci earlier.
24-HR STATISTICS: Max (0900-0900z): 29.7 at 1255z and 1700z
Min (0900-0900z): 14.6 at 0500z
Rain (0900-0900z): Nil

1200z SW F2 15km -HZ 3Cu050 31.2/17.2 1018
RMK: Cu med/con. The weather at St. Andrews looks a lot more
pleasant!


Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England

Chalfont St Giles - Thursday 14th July 2005
--------------------------------------------------------------

0530z CALM 4000 HZ 4Ci300 14.9/14.2 1021
RMK: Difficult to decide on how much Ci there is because
the haze makes the sky very milky. It feels as though
it'll be a real stinker today. Not my sort of weather!

0900z SW F2 15km -HZ SKC 26.3/16.6 1020
RMK: I probably over-estimated the amount of Ci earlier.
24-HR STATISTICS: Max (0900-0900z): 29.7 at 1255z and 1700z
Min (0900-0900z): 14.6 at 0500z
Rain (0900-0900z): Nil

1200z SW F2 15km -HZ 3Cu050 31.2/17.2 1018
RMK: Cu med/con. The weather at St. Andrews looks a lot more
pleasant!

1500z SW F2-3 20+km 2Cu050 6Ci300 30.9/14.9 1016
RMK: Quite a change since 12z. The haze has dispersed and the
Cu development has decreased markedly. Not sure if the
Ci has developed or was there before but was not visible
because of the haze. Temperature has been above 30.0c
since 1115z


Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England