“Inside a cumulonimbus cloud, particles of rain, snow or ice move up and down, colliding and causing an imbalance in the electrical charge. Cloud-to-ground lightning, as seen in this image, happens when a channel of negative charge zigzags downward in a ‘forked pattern’. This is usually invisible to the human eye and travels to the… Continue reading See the tempestuous finalists of the Weather Photographer of the Year Awards