OK who can work out what the circular feature is over Holland? (log in
required - free reg)

http://www.sat.dundee.ac.uk/abin/pro...roject.ch2.jpg

"Trevor Appleton" schreef in bericht
...

OK who can work out what the circular feature is over Holland? (log in
required - free reg)

http://www.sat.dundee.ac.uk/abin/pro...roject.ch2.jpg

Its not Holland, Trevor, its NW-France. Our country is much smaller than you
think
But strange vortex indeed.
Another pictu
http://rapidfire.sci.gsfc.nasa.gov/s....terra.1km.jpg

Wijke
Centre of Holland

Trevor Appleton wrote in message
...
:OK who can work out what the circular feature is over Holland? (log in
:required - free reg)
:http://www.sat.dundee.ac.uk/abin/pro...5/1412/project
..ch2.jpg

I have no idea what it is but a poster to the Belgian (Flemish) weather
group has also noticed and commented on it. In the satpic above it is not
over Holland, but over the "Westhoek" - the part of the Belgian coastal area
next to the French border.

Colin Youngs
Brussels

Wijke wrote in message ...

:"Trevor Appleton" schreef in bericht
...
: OK who can work out what the circular feature is over Holland? (log in
: required - free reg)
http://www.sat.dundee.ac.uk/abin/pro...5/1412/project.
ch2.jpg

:Its not Holland, Trevor, its NW-France. Our country is much smaller than
you
:think
:But strange vortex indeed.
:Another pictu
:http://rapidfire.sci.gsfc.nasa.gov/s...5036/AERONET_L
ille.2005036.terra.1km.jpg


Quite definitely France in that satpic. The poster on the Belgian group
implied that he had seen it move from France to be over SW Belgium at the
time he was writing.

Do you know the time the Rapidfire picture was taken, Wijke ? I would
guess late morning. Brussels still has just high cloud and contrails.
The thicker cloud moving in from the west appeared here just after midday.

Colin Youngs
Brussels

"Colin Youngs" wrote in message


Trevor Appleton wrote in message
...
:OK who can work out what the circular feature is over Holland? (log in
:required - free reg)
:http://www.sat.dundee.ac.uk/abin/pro...5/1412/project
.ch2.jpg

I have no idea what it is but a poster to the Belgian (Flemish) weather
group has also noticed and commented on it. In the satpic above it is not
over Holland, but over the "Westhoek" - the part of the Belgian coastal area
next to the French border.

Colin Youngs
Brussels

It has also been the subject of much discussion in Exeter, not least
which country the vortex was over ;-)

Jon.





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"Colin Youngs" schreef in bericht
...
I have no idea what it is but a poster to the Belgian (Flemish) weather
group has also noticed and commented on it. In the satpic above it is
not
over Holland, but over the "Westhoek" - the part of the Belgian coastal
area
next to the French border.

Problem is: the Flemish weathergroup didn't solve this mystery either. So
any suggestions are very welcome.

Wijke

It's right on the France/Belgium border.
Somewhere between the towns of Wormhout in France and Poperinge in
Belgium.
Is it a small low? Maybe with big temperature diffrence since it's
wintry cold on the continent and morning and at the same time the
North Sea much warmer.
I see there are also a line of hills (with lookout points) just south
of it, rougly parallel to the cost. Could they block the air coming
up from the south, and decrease the pressure?

Bjørn Sørheim

On Sat, 5 Feb 2005 17:02:50 -0000, "Trevor Appleton"
wrote:


OK who can work out what the circular feature is over Holland? (log in
required - free reg)

http://www.sat.dundee.ac.uk/abin/pro...roject.ch2.jpg

"Wijke" wrote in message...
I have no idea what it is but a poster to the Belgian (Flemish) weather
group has also noticed and commented on it. In the satpic above it is
not
over Holland, but over the "Westhoek" - the part of the Belgian coastal
area
next to the French border.

Problem is: the Flemish weathergroup didn't solve this mystery either. So
any suggestions are very welcome.

Wijke

Only a guess Wijke - possibly a weakly developed Von Karman vortex downwind
of the French Massif Central. Note on the Modis image there appears to be
another similar pattern developing in the cloud to the south south west.

No evidence of vorticity at the surface on these hourly plots:

http://meteocentre.com/analyse/map.p...=en&map=France

Karl, Orkney, Scotland

"Colin Youngs" schreef in bericht
...
Do you know the time the Rapidfire picture was taken, Wijke ? I would
guess late morning.

Don;t know the exact time ot the Rapidfire pict, Colin. But found this one
from the KNMI:

http://www.knmi.nl/data/satrep/archi...50205_1200.png

Its 12.00 UTC; north of the Somme; Amiens - Arras region.

Wijke

"Wijke" schreef in bericht
...

Its 12.00 UTC; north of the Somme; Amiens - Arras region.

Oeps, I meant the position of our unidentified object.

Wijke