On Mon, 20 Aug 2012 18:13:39 -0700 (PDT)
Tudor Hughes wrote:

On Aug 20, 9:49Â*am, willie eckerslike
wrote:
On Sunday, August 19, 2012 7:29:03 PM UTC+1, Graham P Davis wrote:
On Sun, 19 Aug 2012 07:03:21 -0700 (PDT)

Simon S wrote:

Is this not an unusual track for a hurricane to take.

Seem to be making it along way across the Atlantic.

Well, the blob (technical term) does seem to be edging ENE on the
IR loops, and becoming ever closer to the SW'ly jet over that area.

On the Radio 4 0030 forecast Chris Fawkes said there would be
extensive high cloud over S England tomorrow (Tues), this having spun
off from hurricane Gordon. Can this really be true? Since when did
feeble ex-hurricanes have a 2000-mile cirrus shield flung out ahead of
them? Maybe Gordon has just about engaged the jet stream but surely
this is a misleading connection to make? I cannot see any evidence of
this on various satpics. It sounds like journalistic hyperbole to me.


I don't know what satellite pictures you were looking at, but the past
couple of days of Meteosat pictures show the outflow cloud from
hurricane Gordon being sheared further and further NE towards the UK.
The reason for Gordon declining to a "feeble ex-hurricane" - apart from
it encountering lower sea temperatures - was the increasing shear it
encountered as an upper trough caught up with it.

So, no "journalistic hyperbole" after all.


--
Graham Davis, Bracknell, Berks. E-mail: change 'boy' to 'man'
"A neighbour put his budgerigar in the mincing machine and invented
shredded tweet." - Chic Murray
openSUSE Linux: http://www.opensuse.org/en/

On 21/08/2012 07:54, Graham P Davis wrote:
I don't know what satellite pictures you were looking at, but the past
couple of days of Meteosat pictures show the outflow cloud from
hurricane Gordon being sheared further and further NE towards the UK.
The reason for Gordon declining to a "feeble ex-hurricane" - apart from
it encountering lower sea temperatures - was the increasing shear it
encountered as an upper trough caught up with it.


.... not sure if this link will work, but it takes you to the Meteosat
site where you can pull up WV imagery and animate same. Unfortunately
there is no ability to enhance the contrast (or colour-slice) so it's a
bit 'wishy-washy', but you can pick out the high-concentration WV (and
solid/liquid state water) being injected into the upper troposphere from
'Gordon' and then latterly being picked up and shed NE'wd ahead of the
major upper trough progressing towards the British Isles.

http://oiswww.eumetsat.org/IPPS/html...ROPE/index.htm

[Accessed: 21/2020Z AUG 2012 - change the 'frames in animation' to 24
from the default '2']

Martin.



--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

On Tue, 21 Aug 2012 09:24:15 +0100
Martin Rowley wrote:

On 21/08/2012 07:54, Graham P Davis wrote:
I don't know what satellite pictures you were looking at, but the
past couple of days of Meteosat pictures show the outflow cloud from
hurricane Gordon being sheared further and further NE towards the
UK. The reason for Gordon declining to a "feeble ex-hurricane" -
apart from it encountering lower sea temperatures - was the
increasing shear it encountered as an upper trough caught up with
it.


... not sure if this link will work, but it takes you to the
Meteosat site where you can pull up WV imagery and animate same.
Unfortunately there is no ability to enhance the contrast (or
colour-slice) so it's a bit 'wishy-washy', but you can pick out the
high-concentration WV (and solid/liquid state water) being injected
into the upper troposphere from 'Gordon' and then latterly being
picked up and shed NE'wd ahead of the major upper trough progressing
towards the British Isles.

http://oiswww.eumetsat.org/IPPS/html...ROPE/index.htm

[Accessed: 21/2020Z AUG 2012 - change the 'frames in animation' to 24
from the default '2']


Thanks for that, Martin. I was using the Dundee University pictures and
cycling through by hand. The WV images are at
http://www.sat.dundee.ac.uk/geobrows...&grid=1&size=1
and can be cycled through at 6-hourly steps by clicking the "+" and "-"
buttons. They have the advantage of going back further so that one can
start when Gordon was still a hurricane. They might take a while if
your broadband is a bit narrow but smaller images are available.



--
Graham Davis, Bracknell, Berks. E-mail: change 'boy' to 'man'
"A neighbour put his budgerigar in the mincing machine and invented
shredded tweet." - Chic Murray
openSUSE Linux: http://www.opensuse.org/en/

I don't know what satellite pictures you were looking at, but the past
couple of days of Meteosat pictures show the outflow cloud from
hurricane Gordon being sheared further and further NE towards the UK.
The reason for Gordon declining to a "feeble ex-hurricane" - apart from
it encountering lower sea temperatures - was the increasing shear it
encountered as an upper trough caught up with it.

So, no "journalistic hyperbole" after all.



I did wonder if some of the sub-tropical air in Gordon, coming our way
would result in some increase in rainfall, but looking at the latest IR
animation the main body of Gordon remains just west of Portugal, so
perhaps it was just the sheer and cirrus outflow which has become
entrained.

Cheers
James
--
James Brown