50.5 MB (2.4 MB compressed)
3425 x 5157 pixels
29.0 x 43.7 cm ⏐ 11.4 x 17.2 in (300dpi)
DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY
Storm cloud. This type of cloud is known as cumulus congestus. Cumulus clouds are formed by the upward convection of warm, moist air. If they develop to the size and intensity of these cumulus congestus, heavy showers are likely to result. Photographed in the UK.
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