Around 1420 I heard thunder from Southampton, the first time I've
heard thunder in the UK since 15/6/08. Seems to be a locally
developing shower, what's odd is that the showers are developing S of
here, towards the sea; normally at this time of year they develop
overland. A contrast to the last couple of days, which were rather
uneventful round here, except some brief heavy rain around 0930
yesterday.

Nick

"Nick" wrote in message
...
Around 1420 I heard thunder from Southampton, the first time I've
heard thunder in the UK since 15/6/08. Seems to be a locally
developing shower, what's odd is that the showers are developing S of
here, towards the sea; normally at this time of year they develop
overland. A contrast to the last couple of days, which were rather
uneventful round here, except some brief heavy rain around 0930
yesterday.

Nick

I'd hazard a guess that localised convergence has come into play with the
general WNW'ly flow being backed towards the coast aiding the development of
showers where the air streams converge inland. I've witnessed some lengthy
storms in the Bournemouth/IOW area due to this effect.
The relatively coarse GFS had a stab at it earlier with the winds but failed
to resolve the showers http://www.wetterzentrale.de/pics/Rmgfs095.gif

Jon.

Nick wrote:

Around 1420 I heard thunder from Southampton, the first time I've
heard thunder in the UK since 15/6/08. Seems to be a locally
developing shower, what's odd is that the showers are developing S of
here, towards the sea; normally at this time of year they develop
overland. A contrast to the last couple of days, which were rather
uneventful round here, except some brief heavy rain around 0930
yesterday.


The radar echoes appear to be overland - just. Developing along a sea-breeze
front?

--
Graham P Davis, Bracknell, Berks., UK. E-mail: newsman not newsboy
"I wear the cheese. It does not wear me."

"Graham P Davis" wrote in message
...
Nick wrote:

Around 1420 I heard thunder from Southampton, the first time I've
heard thunder in the UK since 15/6/08. Seems to be a locally
developing shower, what's odd is that the showers are developing S
of
here, towards the sea; normally at this time of year they develop
overland. A contrast to the last couple of days, which were rather
uneventful round here, except some brief heavy rain around 0930
yesterday.


The radar echoes appear to be overland - just. Developing along a
sea-breeze
front?


.... just returned from a trip to Poole .. as we went towards the
coast, passed underneath line of well-developed Cu med/con (with just
a few droplets of rain), then crossed over to a relatively clear
(Ci/Cu fra only) area nearer the coast. Returning here recently
(1515Z), fine day, with scrappy Cu underneath Ci, and a gusty wind.
The wind shifted at Hurn (EGHH) between 09 & 10Z, from a W'ly or
WNW'ly to a W'ly or SW'ly - convergent flow developing inland
underneath a well-defined 500 hPa trough.

Martin.


--
Martin Rowley
West Moors, East Dorset (UK): 17m (56ft) amsl
Lat: 50.82N Long: 01.88W
NGR: SU 082 023