Date: Tuesday 17th July 1998   Time: 18:20 BST
Macclesfield, Cheshire UK
Path: 5 miles north of Macclesfield, travelling East

Polar maritime airmass
Duration: 30 minutes passing
Type: Open-cell Multicell
Average lightning type: C-C
Average discharge rate: 255 seconds
Footage Quality:


As T0016 and a few other cells trundled over the hills, a very large but still pretty weak cell followed in from the ENE. These storms were all forming in a convergence line (like a daisy chain) in line with the polar maritime flow. It appeared initially to have strong development and a well-defined large mushroomed anvil. Although the cell was about 5-7 miles north from Macclesfield, the anvil was almost overhanging overhead. As it passed by, distant thunders were heard amongst the daytime noise pollution.

Only 2 discharges were captured on camera during it's passing; the first was a C-G strike in the far bottom-right of the screen. At the time I was filming the arc of towers in hope of videoing the cell lighting up like a bulb, or capturing a large positive flash strike from the anvil to the ground, and hence why I wasn’t including the cloud base in the frame. The second discharge was a C-C discharge which was fully caught on camera. Both discharges were very bright considering they occurred during the daytime at more than 5 miles distance.

After the cell rolled over the Pennines the daisy chain eventually swept over Macclesfield in the form of electrically-inactive cells with heavy rain and bubbly updraught bases.

CHARTS (Credits)

SFERICS (Credits)

VISIBLE 17.07.1998 17:45Z

INFRARED 17.07.1998 17:45Z
VISIBLE 17.07.1998 17:45Z + Grid

INFRARED 17.07.1998 17:45Z + Grid


© Mark Seltzer  www.electricsky.co.uk


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