Date: Sunday 1st October 2006
Macclesfield, Cheshire UK
Path: Overhead, maturing over the Pennines moving east
Returning Polar/Warm-core unstable airmass (warm air directly
below strong upper vortex)
Duration: 20 minutes
Average lightning type: C-C
Average discharge rate: 444 seconds
Footage Quality: DV 720x576 / Digicam
There was a mature low filling in to the west with some unusually substantial convective
activity spiralling in the centre (see satellite images below for day
before). 850hPa temperature charts indicate it had a "warm core", which
explains such widespread activity. Once it progressed over the UK it was a
standard heavy shower day, and some of the CBs looked a bit wintry.
Interestingly the lightning activity towards the southeast of the country
was quite large for a returning polar maritime.
This particular cell wasn’t very active over Macclesfield, but it
did give a few rumbles of thunder, including a C-C which was just caught
off to one side of the camera view, apparently directly over
Macclesfield Forest as reported by a friend who was there at the time.
The cell then continued
to move over the Pennines leaving trailing dissipating cells behind mixed in
with a bit of drifting wintry Mammatus from the anvil top.
SATELLITE IMAGE (Credits)
VISIBLE 01.10.2006 14:04
VISIBLE 01.10.2006 14:04 + Grid
INFRARED 01.10.2006 14:04
INFRARED 01.10.2006 14:04 + Grid
Previous day's Satellite of convective vortex