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Old July 22nd 13, 07:09 PM posted to uk.sci.weather
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Default [OBS] Romsey - Monday 22nd July 2013

A sultry evening is following on from a steamy day.

Thunder first audible to the west at 1718Z, with frequent
peals since. Lightning now visible at 1747Z and 1750Z.

This cell appears to be expanding to the north but other
anvils are sprouting from the ranks of Ac castellanus.

Little pptn observed falling from the base of the storm
clouds at present and not a drop of rain here so far.

SYNOP 22/1750Z (current ob)
03/// 31865 61605 10254 20170 40129 53001 71711 85082
333 10292 83357 84360=

METAR
EG// 221750Z 16005KT 9999 TS SCT070 SCT100 25/17
Q//// BLU=

Details:
wind... SSE, force 2 (backed from SSW in last hour).
visibility... 15km.
weather... moderate intensity thunderstorm without rain.
clouds... 3/8 Ac cas 7000ft, 4/8 Ac cas 10000ft,
1/8 Ac 15000ft, 3/8 Ci spi 25000ft.
dry bulb... +25.4C.
dew point... +17.0C.
RH... 60%.
sea level pressure... 1013.9mb (was falling, now rising).
max temp today... +29.3C.
12 hour rainfall (0600-1800Z)... 0.0mm.

beaufort letters (1650-1750Z)... bcy,ctloy,ctl.

Nigel (Romsey, Hampshire)
40m amsl



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Old July 22nd 13, 08:08 PM posted to uk.sci.weather
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Posts: 742
Default [OBS] Romsey - Monday 22nd July 2013

As rapidly as the clouds developed, they've decayed / moved
off the scene. Dense cirrus is currently crowding the sky.

Last thunder heard at 1800Z on the dot. Rain 1808-1810Z.
The storm caused no impact on the visibility.

The few spots of rain that did eventually make it to the ground
only served to ratchet up the humidity still further, although the
dry bulb temp is falling.

SYNOP 22/1750Z
03/// 31865 61605 10254 20170 40139 53001 71711 85082
333 10292 83357 84360=
--------------------------------------------------------
SYNOP 22/1850Z (current ob)
03/// 41965 71802 10233 20171 40145 53009 72962 83082
333 81358 85075=

METAR
EG// 221850Z 18002KT CAVOK 23/17 Q//// RETS BLU=

Details:
wind... S, force 1.
visibility... 15km.
weather... cloudy with recent thunderstorm.
clouds... 1/8 Ac cas 8000ft, 2/8 Ac cas 12000ft,
2/8 Ac 17000ft, 5/8 Ci spi 25000ft.
dry bulb... +23.3C.
dew point... +17.1C.
RH... 68%.
sea level pressure... 1014.5mb (rising).
rainfall last hour... trace.

beaufort letters (1650-1750Z)... bcy,ctloy,ctl.
beaufort letters (1750-1850Z)... ctl,ctlo,cro,c.

Nigel (Romsey, Hampshire)
40m amsl





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