Heavy to torrential rain in the last hour under thick cloud
(Ns with embedded Cb, and scudding St underneath).
One rumble of thunder at 1015Z but no lightning visible.
Visibility reduced to 1200m at around 1035Z.

Over 11mm of rain has fallen in the past 60 minutes alone.

SYNOP 18/1050Z (current ob)
03/// 41230 80307 10123 20117 40142 55000 79266 8692/
333 84705 84920 88535=

METAR
EG// 181050Z 03007KT 3000 +RA SCT005 SCT020CB
OVC035 12/12 Q//// RETS YLO1=

Details:
wind... NE by N, force 3.
visibility... 3000m.
weather... continuous heavy rain with recent thunder.
clouds... as text above.
dry bulb... +12.3C.
dewpoint... +11.7C.
RH... 96%.
sea level pressure... 1014.2mb (was falling, now rising).
rainfall last hour... 11.2mm.
2 hour rainfall (0900-1100Z)... 15.2mm.

beaufort letters (0950-1050Z)... cR,ctloR,cR.

Nigel (Romsey, Hampshire)
40m amsl

Hi Nigel. Torrential rain has now set in at Marlow (Bucks) rain rate 23.00mm an hour, waiting
for thunder this afternoon.
Regards Richard Bailey

Another burst of torrential rain was briefly interrupted by
a complete pause at 1115Z and even a little brightening of
the sky to the southeast. Back to the heavy rain again now.

Temperature unwavering at the 'very cool for August' level,
currently just 1.4C above the average max for November.

SYNOP 18/1050Z
03/// 41230 80307 10123 20117 40142 55000 79266 8692/
333 84705 84920 88535=
-------------------------------------------------------
SYNOP 18/1150Z (current ob)
03/// 11235 80109 10123 20117 40139 50007 60301 76496
8292/ 333 82705 81920 88540=

METAR
EG// 181150Z 01009KT 3500 +RA FEW005 FEW020CB
OVC040 12/12 Q//// YLO1=

Details:
wind... N by E, force 3.
visibility... 3500m (dropped to 1200m again at 1100Z).
weather... heavy rain.
clouds... 2/8 St at 500ft, 1/8 Cb at 2000ft, 8/8 Ns at 4000ft.
dry bulb... +12.3C.
dewpoint... +11.7C.
RH... 96%.
sea level pressure... 1013.9mb (was rising, now falling).
rainfall last hour... 9.7mm.
3 hour rainfall (0900-1200Z)... 24.9mm.
6 hour rainfall (0600-1200Z)... 29.9mm.

beaufort letters (0950-1050Z)... cR,ctloR,cR.
beaufort letters (1050-1150Z)... cR,cir,cR.

Nigel (Romsey, Hampshire)
40m amsl

A further prolonged period of heavy rain has resulted in our
second 10+mm hour today and the event total stands at a
whopping 42.3mm. The road to Romsey from neighbouring
North Baddesley is currently impassable to ordinary cars
due to the depth of water, almost unheard of at this location.

SYNOP 18/1050Z
03/// 41230 80307 10123 20117 40142 55000 79266 8692/
333 84705 84920 88535=
-------------------------------------------------------
SYNOP 18/1150Z
03/// 11235 80109 10123 20117 40139 50007 60301 76496
8292/ 333 82705 81920 88540=
-------------------------------------------------------
SYNOP 18/1250Z (current ob)
03/// 41356 80407 10124 20118 40129 58006 76366 8222/
333 82706 88556=

METAR
EG// 181250Z 04007KT 6000 RA FEW006 OVC060
12/12 Q//// RERA WHT=

Details:
wind... NE, force 3.
visibility... 6km.
weather... moderate rain (recent heavy rain).
clouds... 2/8 St at 600ft, 1/8 Cu at 1800ft, 8/8 Ns at 6000ft.
dry bulb... +12.4C.
dewpoint... +11.8C.
RH... 96%.
sea level pressure... 1012.9mb (sharp fall after earlier rise).
rainfall last hour... 11.0mm.
4 hour rainfall (0900-1300Z)... 35.9mm.
7 hour rainfall (0600-1300Z)... 40.9mm.

beaufort letters (0950-1050Z)... cR,ctloR,cR.
beaufort letters (1050-1150Z)... cR,cir,cR.
beaufort letters (1150-1250Z)... cR,cRR,cr.

Nigel (Romsey, Hampshire)
40m amsl

"Ricardo" wrote in message
...
Hi Nigel. Torrential rain has now set in at Marlow (Bucks) rain rate
23.00mm an hour, waiting
for thunder this afternoon.
Regards Richard Bailey

Hello Richard,

Any thunder with you yet? Only the single rumble here
about 4 hours ago which brings our yearly total of days
with thunder to 4, still below the long term average to
this point in the year.

This is easily our wettest day of the year so far with more
rain falling in the first 3 hours of my 24 hour measuring
period (0900-0900Z) than in any other *whole* such 24
hour period in 2011.

Nigel

On Aug 18, 2:24*pm, "Nigel Paice" wrote:
"Ricardo" wrote in message

...

Hi Nigel. Torrential rain has now set in at Marlow (Bucks) rain rate
23.00mm an hour, waiting
for thunder this afternoon.
Regards Richard Bailey

Hello Richard,

Any thunder with you yet? *Only the single rumble here
about 4 hours ago which brings our yearly total of days
with thunder to 4, still below the long term average to
this point in the year.

This is easily our wettest day of the year so far with more
rain falling in the first 3 hours of my 24 hour measuring
period (0900-0900Z) than in any other *whole* such 24
hour period in 2011.

Nigel

Hi Nigel.

Current rainfall total is 44.00mm at 1326Z in Marlow (Bucks) ,this
could be a record daily total !
No THUN DER !!

Regards Richard Bailey
PS I hope the MetO read this.


Site details: Sheltered back garden near centre of Town, 1 mile from
River Thames. N51:34:28 W0:46:38 SU848868
Regards Richard Bailey

"Ricardo" wrote in message
...

Regards Richard Bailey
PS I hope the MetO read this.

============

Every word of this useful and interesting thread.

Will
--

"Nigel Paice" wrote in message
...
A further prolonged period of heavy rain has resulted in our
second 10+mm hour today and the event total stands at a
whopping 42.3mm. The road to Romsey from neighbouring
North Baddesley is currently impassable to ordinary cars
due to the depth of water, almost unheard of at this location.


Cool! Excellent stuff, keep those reports coming Nigel. I suspect in your
part of the world such totals normally occur with thunderstorms not slow
moving fronts?

Just been boring "drizzle" here on Dartmoor with 5-10mm.

Will
--

"Will Hand" wrote in message
...

"Nigel Paice" wrote in message
...
A further prolonged period of heavy rain has resulted in our
second 10+mm hour today and the event total stands at a
whopping 42.3mm. The road to Romsey from neighbouring
North Baddesley is currently impassable to ordinary cars
due to the depth of water, almost unheard of at this location.


Cool! Excellent stuff, keep those reports coming Nigel. I suspect in your
part of the world such totals normally occur with thunderstorms not slow
moving fronts?

Just been boring "drizzle" here on Dartmoor with 5-10mm.

Will
--

Thanks Will,

I am aware that you occasionally record such values
at Haytor but I can now confirm that our 42.0mm of
rain (and counting) that has fallen today is the highest
total (period 0900-0900Z) in any month for almost 24
years when 47.0mm fell on 9th October 1987, just a
week before the infamous Great Storm.

Only three other days have notched up 40mm or more,
the highest of these was 40.6mm on 27th October 1990.

To answer your question and perhaps surprisingly,
only one out of those four high totals included a
thunderstorm.

Our local brook that can flood, mainly after weeks
of rain in the autumn and winter, has remained within
its banks today but it's the paved areas that have
collected the unusually large ponds.

The neighbour's sunflower has shrunk by a foot !

Nigel

This is the wettest day in any month in Romsey for nearly
24 years.

Non-stop rain this afternoon until about 1740Z when it
became intermittent.

SYNOP 18/1050Z
03/// 41230 80307 10123 20117 40142 55000 79266 8692/
333 84705 84920 88535=
-------------------------------------------------------
SYNOP 18/1150Z
03/// 11235 80109 10123 20117 40139 50007 60301 76496
8292/ 333 82705 81920 88540=
-------------------------------------------------------
SYNOP 18/1250Z
03/// 41356 80407 10124 20118 40129 58006 76366 8222/
333 82706 88556=
-------------------------------------------------------
SYNOP 18/1750Z (retard ob)
03/// 11362 83606 10131 20125 40135 52014 60472 76066
885// 333 10135 81708 85712 88630=

METAR
EG// 181750Z 36006KT 9999 -RA FEW008 BKN012
OVC030 13/13 Q//// GRN=

Details:
wind... N, force 2.
visibility... 12km.
weather... intermittent slight rain.
clouds... 1/8 St at 800ft, 5/8 St at 1200ft, 8/8 Sc at 3000ft.
dry bulb... +13.1C.
dewpoint... +12.5C.
RH... 96%.
sea level pressure... 1013.5mb (rising slowly).
max temp today... +13.5C.
rainfall last hour... 0.1mm.
9 hour rainfall (0900-1800Z)... 42.1mm.
12 hour rainfall (0600-1800Z)... 47.1mm.
event total... 48.5mm.

beaufort letters (1650-1750Z)... cro,ciro.

Nigel (Romsey, Hampshire)
40m amsl