THUNDERSTORM T0108 Date: Tuesday 18th into Wednesday 19th July 2017
Time:
23:29 Local Location:
Exeter, Devon UK. Path: Overhead
Synoptics:
Plume destabilised by upper trough Duration: 1 and a half hours Type: Large Elevated Multicell Average lightning type: C-C (Anvil Crawlers) Footage Quality: Full HD / DSLR
Isolated but locally severe MCS storms
fuelled affected southwest England through daylight hours (Coverack flooding
and T0107)
fuelled by a weak upper trough which destabilised parts of the northern edge
of an elevated Spanish plume. Then, a broader, second trough from an accelerating polar jet in the Atlantic destabilised the
core of the plume overnight and developed a line of strong thunderstorms
across the whole south of the country. Widespread lightning was
observed across the south with reports of the Shard in London getting
hammered by strikes.
200 miles west of London, this elevated
MCS was following the line, but as a separate entity. A
lone back-building multicell cluster on the western edge of the plume which
went directly over Exeter, giving Exeter the best thunderstorm (at least
I've seen) in
many years.