Out of interest, I noticed there are 14 separate centres of LP on the UKMO
12z fax chart for this Sunday 19th Dec.
Is that unusual or haven't I counted before?
Also, is it of any particular significance?

ta, Dave.

"Dave.C" wrote in message
k...
Out of interest, I noticed there are 14 separate centres of LP on the UKMO
12z fax chart for this Sunday 19th Dec.
Is that unusual or haven't I counted before?

I wouldn't say it's particularly unusual but it's certainly quite busy.

Also, is it of any particular significance?

I wouldn't say so. The whole process is quite subjective, e.g. on some
charts the base of a well defined surface trough will be marked with a low
and others won't. The 12Z T+72 is a fairly good example of this, there's
numerous troughs which another forecaster may have marked with a low :
http://imkpc3.physik.uni-karlsruhe.de/pics/brack2.gif
e.g the troughing to the east of Scotland or to the west of Iceland, you can
quickly bring up the count if you're keen :-)

Jon.

Thanks Jon - a bit like artistic license then.

P.S. - must be of some significance as someone on another forum has
independently just noticed exactly the same on the same chart on the same
day. Amazing ;-)

Dave
I read a good book on plagiarism - copies available from.....

On Wed, 15 Dec 2004 19:03:20 -0000, Jon O'Rourke wrote in

Out of interest, I noticed there are 14 separate centres of LP on the UKMO
12z fax chart for this Sunday 19th Dec.
Is that unusual or haven't I counted before?

I wouldn't say it's particularly unusual but it's certainly quite busy.

Also, is it of any particular significance?

I wouldn't say so. The whole process is quite subjective, e.g. on some
charts the base of a well defined surface trough will be marked with a low
and others won't. The 12Z T+72 is a fairly good example of this, there's
numerous troughs which another forecaster may have marked with a low :
http://imkpc3.physik.uni-karlsruhe.de/pics/brack2.gif
e.g the troughing to the east of Scotland or to the west of Iceland, you can
quickly bring up the count if you're keen :-)

Hi Jon - I really thought you'd be tempted to post a link to the classic
ASXX on you site. Now that really is meteorological art at its best:-)

PS getting blowy here right now.

--
Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 15/12/2004 22:43:01 UTC

"Mike Tullett" wrote in message
...

Hi Jon - I really thought you'd be tempted to post a link to the classic
ASXX on you site. Now that really is meteorological art at its best:-)


LOL I was :-)

Jon.

Dave.C wrote:

Out of interest, I noticed there are 14 separate centres of LP on the UKMO
12z fax chart for this Sunday 19th Dec.
Is that unusual or haven't I counted before?
Also, is it of any particular significance?

ta, Dave.

Many years ago, Bert Foord showed an Atlantic chart that was smothered with
lows and not a high to be seen. He asked viewers for a collective noun for
such a group of lows. His own suggestion: a Gloom of Depressions.

Graham

On Thursday, 16 December 2004 17:13:16 UTC, Graham P Davis wrote:
Dave.C wrote:

Out of interest, I noticed there are 14 separate centres of LP on the UKMO
12z fax chart for this Sunday 19th Dec.
Is that unusual or haven't I counted before?
Also, is it of any particular significance?

ta, Dave.

Many years ago, Bert Foord showed an Atlantic chart that was smothered with
lows and not a high to be seen. He asked viewers for a collective noun for
such a group of lows. His own suggestion: a Gloom of Depressions.

A synop of vulcans?
A random pattern overrun?
Numerical deflectometry mistaken for butterfly effect?

Whilst it wouldn't (necessarily) explain the coming snow it would explain the volcanic activity from the day before -which would explain snowfall.

Anyone got a copy of the Many years ago, Bert Foord showed an Atlantic chart that was smothered with lows and not a high to be seen. chart?

Just one example (not major enough in my opinion) but at least you now have to think, if only hard enough to put the thought aside:
https://upload.wikimedia.org/wikiped...cember2004.jpg