I was rather surprised after we had been out on Friday, that 4mm fell
between 19 & 20Z.
Looking at the N17 Sat images for the 13th at 21Z there is a band of cloud
across the SE.
Waghorn, I believe posted about some heavy Ra in in SE London.
Indeed while, we were going out, there was a shower, but things looked as
though they were dying down...seems to mystify me a bit..

Water Butt is full which suggests it wasnt the next door neighbours
sprinkler!

Martin/John any obs ?

Phil

--

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

"Phil Layton" wrote in message
...
I was rather surprised after we had been out on Friday, that 4mm fell
between 19 & 20Z.
Looking at the N17 Sat images for the 13th at 21Z there is a band of
cloud
across the SE.
Waghorn, I believe posted about some heavy Ra in in SE London.
Indeed while, we were going out, there was a shower, but things looked
as
though they were dying down...seems to mystify me a bit..


.... when I did the 1800Z ob, I noted that around 1730Z there had been a
light shower, but this appeared to be from over-arching cloud from a
much larger complex away on my southern horizon - in other words in your
direction. The cloud structure I noted at 18Z was:-
2 oktas Cu med/con (i.e. up to TCU levels), 1 okta Sc (which I judged to
be Cugen .. i.e. from cumuliform development), 1 okta thick Ac (looked
like the 'edge' of something) and 4 oktas thin Ci. Cloud cover noted as
generally dissipating or becoming less organised.

On the NOAA pass you mention, there do appear to be local 'cold' spots
indicating centres of deep, vigorous convection, so with my obs of Cu
con, I would accept your rainfall total quite happily.

To illustrate the marked variability we have had over recent days, the
*previous* day (Thursday) was notable in that there were heavy showers
about ... went over to Windsor in the morning, returning lunchtime, and
roads were *very* wet with standing water: large Cu con / Cb cal/cap
observed, but here at Tawfield, although rain very light, my total
rainfall was 'tr' (notional), in other words, none recorded in gauge.

HTH

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)

"Martin Rowley" wrote in message
...
... when I did the 1800Z ob, I noted that around 1730Z there had been a
light shower, but this appeared to be from over-arching cloud from a
much larger complex away on my southern horizon - in other words in your
direction. The cloud structure I noted at 18Z was:-
2 oktas Cu med/con (i.e. up to TCU levels), 1 okta Sc (which I judged to
be Cugen .. i.e. from cumuliform development), 1 okta thick Ac (looked
like the 'edge' of something) and 4 oktas thin Ci. Cloud cover noted as
generally dissipating or becoming less organised.

On the NOAA pass you mention, there do appear to be local 'cold' spots
indicating centres of deep, vigorous convection, so with my obs of Cu
con, I would accept your rainfall total quite happily.

To illustrate the marked variability we have had over recent days, the
*previous* day (Thursday) was notable in that there were heavy showers
about ... went over to Windsor in the morning, returning lunchtime, and
roads were *very* wet with standing water: large Cu con / Cb cal/cap
observed, but here at Tawfield, although rain very light, my total
rainfall was 'tr' (notional), in other words, none recorded in gauge.

HTH

Martin.

Thanks very much Martin - Ive dug out the Farnborough METARs which are
probably the closest I will get which a
EGLF 131950Z 28005KT 9999 FEW032 SCT056 19/15 Q1010 =
EGLF 131920Z 27006KT 9999 VCSH FEW025 FEW035TCU SCT039 20/16 Q1009 =
EGLF 131850Z 26006KT 9999 VCSH FEW025 FEW030TCU SCT035 19/16 Q1009 =

So I'll go along with it ! - as you say the variation in rainfall in Summer
over a very short distance is marked.

This week may provide some more general rain looking at Weds 12Z Prog....


Phil

In article ,
Phil Layton writes:
I was rather surprised after we had been out on Friday, that 4mm fell
between 19 & 20Z.
Looking at the N17 Sat images for the 13th at 21Z there is a band of cloud
across the SE.
Waghorn, I believe posted about some heavy Ra in in SE London.
Indeed while, we were going out, there was a shower, but things looked as
though they were dying down...seems to mystify me a bit..

Water Butt is full which suggests it wasnt the next door neighbours
sprinkler!

Martin/John any obs ?

In Cranleigh, I heard rain after going to bed on Friday evening,
possibly around 2200Z. (I _think_ it was Friday, anyway, as I remember
being surprised by it.) I didn't notice any rain earlier in the evening.
--
John Hall "Never play cards with a man called Doc.
Never eat at a place called Mom's.
Never sleep with a woman whose troubles
are worse than your own." Nelson Algren

Some heavy showers here in Coulsdon Phil late afternoon/ early evening.
Escaped most of the earlier afternoon showers. A total of 4.6mm fell. This
though would be earlier than you mention though being in the time span
17.00 to 19.00 hrs.
The previous day 12th there was a very active thunderstorm to the west of me
14.00hrs which produced much flooding in the Dorking area- anyone any
rainfall totals for this locality. I recorded just 1.1mm.
Ian Currie-Coulsdon
www.frostedearth.com


"John Hall" wrote in message
...
In article ,
Phil Layton writes:
I was rather surprised after we had been out on Friday, that 4mm fell
between 19 & 20Z.
Looking at the N17 Sat images for the 13th at 21Z there is a band of
cloud
across the SE.
Waghorn, I believe posted about some heavy Ra in in SE London.
Indeed while, we were going out, there was a shower, but things looked as
though they were dying down...seems to mystify me a bit..

Water Butt is full which suggests it wasnt the next door neighbours
sprinkler!

Martin/John any obs ?

In Cranleigh, I heard rain after going to bed on Friday evening,
possibly around 2200Z. (I _think_ it was Friday, anyway, as I remember
being surprised by it.) I didn't notice any rain earlier in the evening.
--
John Hall "Never play cards with a man called Doc.
Never eat at a place called Mom's.
Never sleep with a woman whose troubles
are worse than your own." Nelson Algren

Phil,

I am not surprised at all at your report - there was torrential rain around
Kingston at the time (cloud band moving south) and my 24 h total to 09h
Saturday a few km to west was 15.0mm. My wettest day for a long time! Most of
this fell late pm and early evening. If I recall the radar images correctly,
there was a WNW to ESE line of sharply defined convectional rain (shower does
not seem quite the right word!) aligned just ahead of the southward moving
dissipating front.

Julian
Julian Mayes, Molesey, Surrey.

Phil,

I am not surprised at all at your report -.......... there was torrential rain around
Kingston at the time (cloud band moving south) and my 24 h total to 09h
Saturday a few km to west was 15.0mm.
Julian
No gauge here,but not surprised at any of these totals judging from rain that fell in Catford.
The RAOB is highly supportive of convection presuming it's representative of the 'pre frontal'
airmass.
http://weather.uwyo.edu/cgi-bin/soun...312&STNM=03882
What also surprised me was that I got the feeling some cells seem electrified while nearby ones
appeared not to be,

--
regards,
david
(add 17 to waghorne to reply)

"Phil Layton" wrote in message
...
I was rather surprised after we had been out on Friday, that 4mm fell
between 19 & 20Z.
Looking at the N17 Sat images for the 13th at 21Z there is a band of cloud
across the SE.
Waghorn, I believe posted about some heavy Ra in in SE London.
Indeed while, we were going out, there was a shower, but things looked as
though they were dying down...seems to mystify me a bit..

Water Butt is full which suggests it wasnt the next door neighbours
sprinkler!

Martin/John any obs ?

Phil

--

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


All times GMT.

Boughton under Blean, North Kent Coast.

Late post for 13 August 2004.

1400 to 1900 - heavy rain showers deposited 23 mm. Of that, 14.4 mm fell
between 1500 and 1530. This from a thunderstorm passing from west to east.

Together with today's 0.6 mm from a rain shower at 1115, the monthly total
so far now stands at 81.8 mm. This is already my second highest total since
I began collecting data at this site in 1995. My highest August total of
117 mm was in 2001.

My driest August was in 1998 at 6.2 mm.

Colin

Thanks all for the notes.

Today (Sun)

Min 13.6c Max 22.1 Rain T

Light Rain shower this am, after early Sun then mainly cloudy pm.
Light rain this evening

Phil
Guildford