What a time to start observing (0250Z)!
Incredibly frequent lightning, almost all sheet with just
2 IC forks visible... clearly an AC castellanus storm.
In one minute I counted 54 flashes. First thunder heard
around 0130Z, and has been rumbling almost continually
since, now distant to the north.
Currently:

SYNOP 22/0250Z
03/// 41657 72903 10190 20168 40170 57010 7959/
333 8258/ 333 82640 87360=

METAR
EG// 220250Z 29003KT 7000 -TSRA FEW040 BKN100
19/17 Q//// RERA WHT=

Details:
wind... WNW, force 1.
visibility... 7km.
weather... moderate thunderstorm with slight rain (was
heavy thunderstorm... due to frequency of
lightning and thunder... with heavy rain).
clouds... 2/8 SC at 4000ft (flat, innocuous cloud lit up).
7/8 AC castellanus, base 10000ft.
dry bulb... +19.0C.
dewpoint... +16.8C.
RH... 87%.
sea level pressure... 1017.0mb (irregular fall).
rainfall last hour... 4.0mm.
rainfall in storm... 4.8mm.

beaufort letters (0150-0250Z)... cTLR,ctlr,ctlro.

Nigel (Romsey, Hampshire)... back to bed.

Last night:
SYNOP 22/0250Z
03/// 41657 72903 10190 20168 40170 57010 7959/
8258/ 333 82640 87360=
-------------------------------------------------------------
Lunchtime:
SYNOP 22/1150Z
03/// 11415 81816 10192 20162 40165 53010 60011
79562 8698/ 333 81712 86940 88359 91029 333 91129=

METAR
EG// 221150Z 18016G29KT 1500 +TSRA FEW012
BKN040CB OVC090 19/16 Q//// AMB=
--------------------------------------------------------------
Now:
SYNOP 22/1350Z
03/// 41360 70502 10190 20176 40160 51015 79196
8198/ 333 81708 81940 87360=

METAR
EG// 221350Z 05002KT 9999 -RA FEW008 FEW040CB
BKN100 19/18 Q//// RETS RERA BLU=

Details (at 1350Z):
wind... NE, force 1 (was S'ly force 5 at start of storm) .
visibility... 10km (min vis 1500m at 1150Z).
weather... slight rain (was slight thunderstorm with heavy rain
at 1150Z).
clouds... 1/8 ST at 800ft.
1/8 CB, base 4000ft.
7/8 AC castellanus, base 10000ft.
dry bulb... +19.0C.
dewpoint... +17.6C.
RH... 92%.
sea level pressure... 1016.0mb (bumped up 2mb at start of
storm).
rainfall last hour... 2.1mm.
rainfall in storm... 8.3mm.

beaufort letters (1050-1150Z)... c,crou,ctloR.
beaufort letters (1150-1250Z)... ctloR,ctlor.
beaufort letters (1250-1350Z)...ctlor,ctloro,cro.

RMK 1: it's like autumn with leaves strewn everywhere.
RMK 2: electrical activity considerably less than last night's
storm but CG strikes were evident this time round.

Nigel (Romsey, Hampshire)