Question regarding today's Fax charts
 

Hi all,

On today's 00z analysis chart, there's a small low over SW Norway, with an
associated trough:

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

The low then deepens and moves SSW'wards to lie over the southern North Sea
at T+36.

http://129.13.102.67/wz/pics/brack0a.gif

Unlike most lows, this one's not only moved in an odd direction, but it
doesn't seem to have normal fronts - is this a fabled polar low, or merely
some other synoptic feature? (There's also a strange low to the SW of
Svalbard on the same chart, with no fronts at all - again, seems unusual,
but maybe it's just me getting excited that we're having winds from the NE
for once :)

Question regarding today's Fax charts
 

"Darren Prescott" wrote in message
...
Hi all,

On today's 00z analysis chart, there's a small low over SW Norway, with an
associated trough:

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

The low then deepens and moves SSW'wards to lie over the southern North
Sea
at T+36.

http://129.13.102.67/wz/pics/brack0a.gif

Unlike most lows, this one's not only moved in an odd direction, but it
doesn't seem to have normal fronts - is this a fabled polar low, or merely
some other synoptic feature? (There's also a strange low to the SW of
Svalbard on the same chart, with no fronts at all - again, seems unusual,
but maybe it's just me getting excited that we're having winds from the NE
for once :)

To be honest Darren I'm not even sure it's the same low. It looks like a lee
low or at a push a mesoscale PVA with polar origins. If you've got access to
the MetO mesoscale on the Aviation pages you'll see numerous 'spot' surface
lows in the North Sea over the next 36 hours that wax and wane within the
broad upper vortex. By VT 12z tomorrow it appears the most definite
circulation is marked on the T+36 Fax chart (god knows why Wetterzentrale
call them fax charts, finalised would be more appropriate).

Jon.

Question regarding today's Fax charts
 

"Jon O'Rourke"
If you've got access to
the MetO mesoscale on the Aviation pages

Not clear Jon how I access that. Help.

Jack

Question regarding today's Fax charts
 

"Jack Harrison" wrote in message
...

"Jon O'Rourke"
If you've got access to
the MetO mesoscale on the Aviation pages

Not clear Jon how I access that. Help.

Jack

Jack,
Select the British Isles menu, then mesoscale charts and then the cloud,
precipitation and pressure option. The 06z run in now in and the pressure in
the vicinity of Holland is slightly higher (at T+30), hence the lack of a
closed circulation. Otherwise things look largely the same with exposed
northern areas bearing the brunt of some increasingly wintry looking
showers.

Jon.

Question regarding today's Fax charts
 

"Jon O'Rourke"

Select the British Isles menu, then mesoscale charts and then the cloud,
precipitation and pressure option.

Sorted by the simply expedient of renewing my subscription:-)

Thanks

Jack