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PASSING THUNDERSTORM 0003
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Date: 04-06-1999 I saw this group of fast developing cells developing on the horizon in a line in a classic unstable air mass behind a set of fronts, and decided to set the camera to time-lapse mode and watch them grow. They all shot up quickly to form anvils and started to merge with each other into a long convergence line about 40-50 miles away NW of Macclesfield over the west coast of Lancashire (Southport/Blackpool).
One of the cells, now disappearing behind a set of trees, became electrically active as I spotted a flash of lightning. At this point I started filming normally and zoomed right up to the cells. A cell behind the initial cell also became active and it continued to flash faintly. The development was mostly at the front of the cells with the anvil sloping backwards in the low vertical wind-shear conditions. I caught one good discharge that lit up the front part of a developing cell.
DUNDEE
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