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THUNDERSTORM 0056
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Date: 28-06-2005
An
anticipated system moving up from France brought with it some very active
cumulonimbus cells imbedded within two separate fronts. In the north-west
the first front produced some extraordinarily thick altocumulus of
chaotic-sky nature as severe instability broke out ahead of the main front
given away by plenty of castellanus (some giving precipitation).
Thunderstorms were already breaking out in this instability fuelled by the warm temperatures of the day, and they also started breaking out along the parent front behind it. By the time the activity reached Macclesfield the two waves had merged to form a large-scale deluge of heavy rain over the north-west region. As the system became frontal and widespread, so did the lightning, in which case it became sporadic and consisted mainly of upper-level discharges (I-Cs).
Therefore the lightning was difficult to capture as it was occurring all around the celestial dome and in places it was in call-and-response fashion, where a distant cell would flash then a closer cell would respond to it by flashing back. There were only a few close-by discharges, some with high-amp bassy thunders.
As the front progressed
it dissipated in intensity and continued marching northwards.
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