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Old May 22nd 04, 07:09 AM posted to uk.sci.weather
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Default Rainfall Thu night

I am interested in knowing what locations in the Surrey/Berks area received
for rainfall on Thursday night. Martin/Eric ?

I left Guildford at 6.30 pm to go to Windsor . At around Ascot at 7pm a
really heavy shower caused local flooding with large areas of water covering
the road. It rained for about 90mins and again later in the evening.

When I got back to Guildford at midnight - 'nil points' with a bone dry
surface.

We got 2.3mm between the early hours of yesterday and mid morning yesterday,
but was rather surprised to see nothing from Thursday night.

Weather Online still has 'free' regional radar of the event [which shows a
loit of returns over Surrey in general] which makes it more surprising.

Phil

http://homepage.ntlworld.com/phil.layton/meteo.htm


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Old May 22nd 04, 08:09 AM posted to uk.sci.weather
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Default Rainfall Thu night


"Phil Layton" wrote in message
...
I am interested in knowing what locations in the Surrey/Berks area

received
for rainfall on Thursday night. Martin/Eric ?

I left Guildford at 6.30 pm to go to Windsor . At around Ascot at 7pm

a
really heavy shower caused local flooding with large areas of water

covering
the road. It rained for about 90mins and again later in the evening.

When I got back to Guildford at midnight - 'nil points' with a bone

dry
surface.


For Bracknell (Tawfield) .. (for those further afield, we are about 4
1/2mi or 7km to the WSW of Ascot and about 14 mi or ~23km to the NW of
Guildford)
all times GMT (for BST add 1 hr)

From my log for that evening/night ...

Very light rain shower ~ 1740 GMT; shower moderate, ocnl heavy rain
(accompanied by a squall) between 1805 and 1815 GMT; further moderate
shower of rain around 2100 GMT.

Rainfall recorded 20/1800 to 21/0900 GMT = 4.0mm, of which an estimated
3.5mm (from separate check gauge) fell in the 20/1805-1815 event ...
i.e. a pretty hefty downpour: water was cascading off the house roofs
and our previously empty water butt (I had just emptied that afternoon),
was nearly full by the time this event finished.

I would think that we were on the edge of your observed 'really heavy
shower' at that time (i.e. just after 7pm local time). I noted this into
the newsgroup earlier in the thread "Weather in the south today".....

" After a morning & early afternoon with CU bubbling quite well (base
circa 3200ft, top 8000ft or so), we've now got largely SC at around 5 or
6000ft, with some CU immediately overhead (shallow/non-threatening),
HOWEVER, to the middle-distant east and northeast, tying in with the
radar imagery, some
TCU (towering CU), which must be associated with the SHRA being reported
in the London area atm. "

.... and as I monitored these, they certainly grew at an alarming rate -
indicating vigorous development and suggesting local intense rainfall
.... this ties in with your report.


I'm not surprised though at the variability: as discussed earlier in the
day, in these situations, some get a real downpour - others either
nothing at all or catch the edge. The 1st Test (first day) at Lords
escaped, yet at the Oval (not that far away on the other side of the
river), I understand that the play was seriously disrupted - something
similar happened the following day .... weather forecasting is such a
wonderful game!

Martin.


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Old May 22nd 04, 11:20 AM posted to uk.sci.weather
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Default Rainfall Thu night


"Phil Layton" wrote in message
...
I am interested in knowing what locations in the Surrey/Berks area

received
for rainfall on Thursday night. Martin/Eric ?


Thames Ditton, Surrey

All kicked off around 7.30pm on Thursday, light rain turned torrential and
continued for circa 15 mins then became lighter and continued for another
40-45mins.

I recorded 32mm of rain up to 8.30pm, local flodding in Thames Ditton, no
report of thunder.

A


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Old May 22nd 04, 04:24 PM posted to uk.sci.weather
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Default Rainfall Thu night

I am somewhat surprised by Andrew Bonds rainfall total for Thursday evening
of 32mm ,should that not be 3.2mm ?
My pal Peter Clark who lives over in East Ewell clocked up 15mm between 6pm
and midnight with a further millimetre after then to give a total of 16mm
for the period ,his heaviest fall occured mid evening falling at the rate of
40mm an hour !


RonB
Andrew Bond" wrote in message
...

"Phil Layton" wrote in message
...
I am interested in knowing what locations in the Surrey/Berks area

received
for rainfall on Thursday night. Martin/Eric ?


Thames Ditton, Surrey

All kicked off around 7.30pm on Thursday, light rain turned torrential and
continued for circa 15 mins then became lighter and continued for another
40-45mins.

I recorded 32mm of rain up to 8.30pm, local flodding in Thames Ditton, no
report of thunder.

A




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Old May 22nd 04, 07:10 PM posted to uk.sci.weather
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Default Rainfall Thu night


"Ron Button" wrote in message
...
I am somewhat surprised by Andrew Bonds rainfall total for Thursday

evening
of 32mm ,should that not be 3.2mm ?


Hi Ron,

32mm or an inch and half in old money, was certainly the heaviest most
sustained rainfall I've experienced. Had it continued for a further 5 or 10
minutes then I daresay I'd still be clearing up.. quite a night! East Ewell
is a fair way south from Thames Ditton when you consider this was a
convective cell as opposed more widespread rainfall.

Cheers,

Andrew




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Old May 23rd 04, 08:30 PM posted to uk.sci.weather
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Default Rainfall Thu night

I am somewhat surprised by Andrew Bonds rainfall total for Thursday
evening
of 32mm ,should that not be 3.2mm ?



So was I. Here, just two to three miles WNW of Thames Ditton I recorded 4.7mm
09-09 ending Friday morning, of this around 3.5mm.to 4.0 probably fell in the
heavy evening shower, very similar to Martin's figures for far-off Bracknell.
However, if Peter Clark had 16 in East Ewell, then there certainly was some
abrupt intensification. I would certainly not rule it out judging by the
darkness of the cloud then.

I would be interested to know of Andrew's rainfall total last month, as a cross
check. I had 67mm.

Julian Mayes, West Molesey, Surrey.


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Old May 24th 04, 02:49 PM posted to uk.sci.weather
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Default Rainfall Thu night


"JJCMayes1" wrote in message
...

I would be interested to know of Andrew's rainfall total last month, as a

cross
check. I had 67mm.


Hi guys,

Sorry if I mislead, I don't keep records sadly, although I'm going to buy a
Oregon full kit in the next couple of weeks. My measurement was very
Heath-Robinson like, I had forecast to clients and put on the site that the
front could intensify in the London area and watched one cell make it's way
up the M4, I then dashed out and placed a small plastic rain guage on top of
a post in the garden and waited for the rain. A few drips then all of a
sudden the heavens just opened and it rained solidly for around 15 mins,
even some plants in the garden had their leaves taken off and stalks snapped
due to the ferocity, in all honesty I was surprised that the radar showed
this as yellow/red over me, Lord knows what white must be like!

I didn't measure it until the rain stopped around 8.30pm and it said 32mm
but of course this could have included splash water etc from the fence,
post, nearby trees, plants etc , it was really only put there to measure how
intense it was and the value didn't surprise me. Perhaps others in nearby
Surbiton or Kingston have recordings measured in a more "professional" way
;-)

Cheers,

Andrew


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Old May 22nd 04, 04:19 PM posted to uk.sci.weather
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Default Rainfall Thu night

Phil,
Here in Wokingham, trace in shower at 1755Z on 20th, 0.7 mm in mod rash at
2025 on 20th, 0.1 mm in slight shower at 1255Z on 21st.
Here endeth the report for the Berkshire desert.



--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html





"Phil Layton" wrote in message
...
I am interested in knowing what locations in the Surrey/Berks area

received
for rainfall on Thursday night. Martin/Eric ?

I left Guildford at 6.30 pm to go to Windsor . At around Ascot at 7pm a
really heavy shower caused local flooding with large areas of water

covering
the road. It rained for about 90mins and again later in the evening.

When I got back to Guildford at midnight - 'nil points' with a bone dry
surface.

We got 2.3mm between the early hours of yesterday and mid morning

yesterday,
but was rather surprised to see nothing from Thursday night.

Weather Online still has 'free' regional radar of the event [which shows a
loit of returns over Surrey in general] which makes it more surprising.

Phil

http://homepage.ntlworld.com/phil.layton/meteo.htm




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Old May 22nd 04, 05:38 PM posted to uk.sci.weather
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Default Rainfall Thu night


"Bernard Burton" wrote in message
...
Phil,
Here in Wokingham, trace in shower at 1755Z on 20th, 0.7 mm in mod

rash at
2025 on 20th, 0.1 mm in slight shower at 1255Z on 21st.
Here endeth the report for the Berkshire desert.


.... indeed, although, as noted, our water butt benefited - the soil
surface dried dramatically within 24hr of said 4.0mm of rain - it is as
if it had never fallen!

Martin.

--
Martin Rowley: data via -
http://homepage.ntlworld.com/booty.weather/metindex.htm
Bracknell (Wooden Hill/Tawfield), Berkshire
NGR: SU 854 667 Elev: 80m
Lat: 51DEG23MIN30SEC(N): Long: 00DEG46MIN28SEC(W)


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Old May 23rd 04, 07:15 AM posted to uk.sci.weather
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Default Rainfall Thu night

Thanks all for your reports. It does look as though there was a very
variable amount of rain.

Min 2.1c last night so not quite as cold....

Phil




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