One kind of rain cloud is the cumulonimbus cloud. Meteorologists have studied how cumulonimbus clouds are formed and how they produce rain, hail, and lightning. They have found that cumulonimbus clouds go through the following steps to produce rain: 1) The clouds are pushed by the wind: Cumulonimbus clouds begin to form when wind pushes some small pieces of clouds (cumulus clouds) to an area where these clouds converge (see figures 17 and 18).
2) Joining: Then the small clouds join together forming a larger cloud1 (see figures 18 and 19).
3) Stacking: When the small clouds join together, updrafts within the larger cloud increase. The updrafts near the center of the cloud are stronger than those near the edges.2 These updrafts cause the cloud body to grow vertically, so the cloud is stacked up (see figures 19 (B), 20, and 21). This vertical growth causes the cloud body to stretch into cooler regions of the atmosphere, where drops of water and hail formulate and begin to grow larger and larger. When these drops of water and hail become too heavy for the updrafts to support them, they begin to fall from the cloud as rain, hail, etc.3
God has said in the Quran:
Meteorologists have only recently come to know these details of cloud formation, structure, and function by using advanced equipment like planes, satellites, computers, balloons, and other equipment, to study wind and its direction, to measure humidity and its variations, and to determine the levels and variations of atmospheric pressure.4 The preceding verse, after mentioning clouds and rain, speaks about hail and lightning:
Meteorologists have found that these cumulonimbus clouds, that shower hail, reach a height of 25,000 to 30,000 ft (4.7 to 5.7 miles),5 like mountains, as the Quran said, “...And He sends down hail from mountains (clouds) in the sky...” (see figure 21 above). This verse may raise a question. Why does
the verse say “its lightning” in a reference to the hail? Does this
mean that hail is the major factor in producing lightning? Let us see what
the book entitled Meteorology Today says about this. It says that a
cloud becomes electrified as hail falls through a region in the cloud of
supercooled droplets and ice crystals. This information on lightning was discovered
recently. Until 1600 AD, Aristotle’s ideas on meteorology were
dominant. For example, he said that the atmosphere contains two kinds of
exhalation, moist and dry. He also said that thunder is the sound of the
collision of the dry exhalation with the neighboring clouds, and lightning is
the inflaming and burning of the dry exhalation with a thin and faint fire.7
These are some of the ideas on meteorology that were dominant at the time of the
Quran’s revelation, fourteen centuries ago. _____________________________ Footnotes: (1) See The Atmosphere,
Anthes and others, pp. 268-269, and Elements of Meteorology, Miller and
Thompson, p. 141. (2) The updrafts near the
center are stronger, because they are protected from the cooling effects by the
outer portion of the cloud. (3) See The Atmosphere,
Anthes and others, p. 269, and Elements of Meteorology, Miller and
Thompson, pp. 141-142. (4) See Ee’jaz al-Quran
al-Kareem fee Wasf Anwa’ al-Riyah, al-Sohob, al-Matar, Makky and others,
p. 55. (5) Elements of
Meteorology, Miller and Thompson, p. 141. (6) Meteorology Today,
Ahrens, p. 437. (7) The Works of
Aristotle Translated into English: Meteorologica, vol. 3, Ross and others,
pp. 369a-369b. Home Page: www.islam-guide.com |