Tuesday 12th October 2010

Meteosat 8 satellite picture from Ferdinand Valk's site at 12.00 UTC
http://www.fvalk.com/images/Day_image/MSG-1200-EUR.jpg

Meteosat MSG-2 satellite picture from Bernard Burton's site at 12.00 UTC
http://www.woksat.info/etcsj12m/sj12-msg-1200-uk.html

NOAA 19 satellite picture from Bernard Burton's site at 12.14 UTC
http://www.woksat.info/etcsj12/sj12-1214-b-uk.html

Patchy low cloud or fog over parts of the British Isles. Sunny in Belgium.


UK min. temps on Monday night http://tinyurl.com/34zrk8p

Castlederg and Keswick 1.0°C, Hawarden 0.9°C, Aboyne 0.8°C, Altnaharra
and Eskdalemuir 0.0°C, Woodford -0.3°C, West Freugh -0.7°C,
Warcop -0.9°C, Tulloch Bridge -1.3°C, Shap -1.5°C.

Weybourne 11.5°C, Manston 11.9°C, Pembrey Sands 12.1°C, St Mary's
(Scilly) and Jersey 12.3°C, Guernsey 13.1°C.


UK max. temps on Tuesday http://tinyurl.com/3ahxzru

Aboyne 7.3°C, Dundrennan 8.0°C, Inverbervie 8.1°C, Strathallan 8.2°C,
Lerwick, Lossiemouth and Kinloss 8.9°C.

Thorney Island and Herstmonceux 16.2°C, Castlederg and Gravesend 16.5°C,
Trawsgoed 16.7°C, St Catherine's Point and Jersey 16.9°C, Chivenor 17.1°C,
Plymouth 18.0°C, Solent MRSC 18.1°C.

OGIMET summary http://tinyurl.com/2v789qm


Rainfall radar http://www.meteox.com/h.aspx?r=&soort=loop24uur&URL or
http://www.raintoday.co.uk/

Patches of rain over central Ireland on Tuesday evening.

Rainfall totals in 24 hours ending 18.00 UTC on Tuesday
http://tinyurl.com/36dxju2

Glenanne, Baltasound, South Uist, Tiree, Aviemore, Drumalbin, Dundrennan and
Mona (Anglesey) 0.4 mm.


Location of some UK stations
http://www.metoffice.gov.uk/educatio...r_data_uk.html


Colin Youngs
Brussels

On Tue, 12 Oct 2010 21:35:17 +0200, "Colin Youngs"
wrote:

UK max. temps on Tuesday http://tinyurl.com/3ahxzru

Plymouth 18.0°C, Solent MRSC 18.1°C.

OGIMET summary http://tinyurl.com/2v789qm

Max here 5 miles inland from Solent was 15.3 (entirely shaded from the
sun).

Highest half-hourly METAR at Southampton Airport (12 miles inland) was
14 (rounded).

That 2.8 "Stevenson" difference is I think the highest I've ever seen
in offshore wind conditions here. Makes you think.

--
Dave
Fareham (W)

"Dave Ludlow" schreef in bericht
...

: On Tue, 12 Oct 2010 21:35:17 +0200, "Colin Youngs"
: wrote:
: : UK max. temps on Tuesday http://tinyurl.com/3ahxzru
: Plymouth 18.0°C, Solent MRSC 18.1°C.

: Max here 5 miles inland from Solent was 15.3 (entirely shaded from the
: sun).
: Highest half-hourly METAR at Southampton Airport (12 miles inland) was
: 14 (rounded).
: That 2.8 "Stevenson" difference is I think the highest I've ever seen
: in offshore wind conditions here. Makes you think.

Seems to be a consequence of the exposure of the Solent site that you have
described before - not a misreading of the instruments. NE wind throughout
of course.

Met Office website 24-hour graph
http://www.metoffice.gov.uk/weather/...er_graphs.html
shows 18°C at 14.00 and 17°C at 13.00, 15.00 and 16.00.

Colin Youngs
Brussels

"Colin Youngs" wrote ...
: : UK max. temps on Tuesday http://tinyurl.com/3ahxzru
: Plymouth 18.0°C, Solent MRSC 18.1°C.

[and]
"Dave Ludlow" schreef ...
: Max here 5 miles inland from Solent was 15.3 (entirely shaded from
: the
: sun).
: Highest half-hourly METAR at Southampton Airport (12 miles inland)
was
: 14 (rounded).
: That 2.8 "Stevenson" difference is I think the highest I've ever
seen
: in offshore wind conditions here. Makes you think.

[and]
"Colin Youngs" wrote ...
Seems to be a consequence of the exposure of the Solent site that
you have
described before - not a misreading of the instruments. NE wind
throughout
of course.

Met Office website 24-hour graph
http://www.metoffice.gov.uk/weather/...er_graphs.html
shows 18°C at 14.00 and 17°C at 13.00, 15.00 and 16.00.

.... Hurn, with essentially the same weather-type yesterday (Tuesday),
managed 15.9°C, from total sunshine 8.5 hours; the sunshine was very
strong for several hours, but enough breeze to stir things up at an
open site to prevent local intense warming.

I don't quote my own temperature readings because they are so out of
kilter with a 'standard' site, but to give you an idea how a *heavily*
sheltered site behaves, our maximum yesterday was 18, some 2degC above
Hurn.

Solent temperature is a 'real' temperature, but it is highly
questionable how 'representative' it is of a broader area.

Martin.

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

On Wed, 13 Oct 2010 09:18:36 +0100, "Martin Rowley"
wrote:

"Colin Youngs" wrote ...
: : UK max. temps on Tuesday http://tinyurl.com/3ahxzru
: Plymouth 18.0°C, Solent MRSC 18.1°C.

[and]
"Dave Ludlow" schreef ...
: Max here 5 miles inland from Solent was 15.3 (entirely shaded from
: the : sun).
: Highest half-hourly METAR at Southampton Airport (12 miles inland)
was : 14 (rounded).
: That 2.8 "Stevenson" difference is I think the highest I've ever
seen : in offshore wind conditions here. Makes you think.

[and] "Colin Youngs" wrote ...
Seems to be a consequence of the exposure of the Solent site that
you have
described before - not a misreading of the instruments. NE wind
throughout
of course.

Met Office website 24-hour graph
http://www.metoffice.gov.uk/weather/...er_graphs.html
shows 18°C at 14.00 and 17°C at 13.00, 15.00 and 16.00.

... Hurn, with essentially the same weather-type yesterday (Tuesday),
managed 15.9°C, from total sunshine 8.5 hours; the sunshine was very
strong for several hours, but enough breeze to stir things up at an
open site to prevent local intense warming.

I don't quote my own temperature readings because they are so out of
kilter with a 'standard' site, but to give you an idea how a *heavily*
sheltered site behaves, our maximum yesterday was 18, some 2degC above
Hurn.

Solent temperature is a 'real' temperature, but it is highly
questionable how 'representative' it is of a broader area.

And yet they have a mostly grass covered airfield within 50 metres of
and adjacent to what I call their "domestic front garden" site. It
would be failrly easy to site an AWS there and would I think be more
representative. Running the cables (if needed) wouldn't be
particularly expensive. Looks like they took the cheap option when
Soton Weather Centre closed.

Southampton airport puzzles me. Its METAR temperatures are invariably
identical to my own 7 miles away (rounded to a degree) and yet my
enclosure is always shaded from the sun, so no sunny wooden stevenson
screen effect. I suspect that either their screen is similarly shaded
by buildings, is a plastic screen, or that it is aspirated so in
effect, like my own site, perhaps it is also unrepresentative in
comparison to nearby sites using a standard screen. Southampton
Oceanography Centre doesn't help much either, the instruments are on
top of a rather high building!

--
Dave
Fareham (W)