A rarely seen form of lightning in which a stroke appears to have a considerable width or even to consist of individual parallel channels. It occurs when a very strong wind is blowing at right angles to the observer's line of sight. The multiple strokes that form a single discharge are thus displaced horizontally from one another. A similar appearance may occur when the observer (or camera) is moving approximately perpendicular to the line of sight.
Subjects: Meteorology and Climatology.