Science for beginners . ways present. ually until it stops. Not long after the rain ends, and some-times before it ends, the clouds begin to break. About oneto three hours later, especially if it is toward evening, youcan sometimes see in the east the brilliantly lighted tops ofthe departing storm cloud. The tops of cumulo-nimbus re-flect the light of the setting i Sometimes the sun may set clear while a sheet of storm cloudcovers most of the sky. The sun then shines under the west edge of LOCAL STORMS 183 195. The Winds of a Thunderstorm.—The winds, at theground, near a thunderstorm oft
Science for beginners . ways present. ually until it stops. Not long after the rain ends, and some-times before it ends, the clouds begin to break. About oneto three hours later, especially if it is toward evening, youcan sometimes see in the east the brilliantly lighted tops ofthe departing storm cloud. The tops of cumulo-nimbus re-flect the light of the setting i Sometimes the sun may set clear while a sheet of storm cloudcovers most of the sky. The sun then shines under the west edge of LOCAL STORMS 183 195. The Winds of a Thunderstorm.—The winds, at theground, near a thunderstorm often blow outward on all sides,away from the storm (Fig. 140). When a storm comes fromthe west, the wind close in front with the squall cloud, isfrom the west. When the rain is about ended the windsometimes has changed to the east and is blowing back as alight or brisk breeze from the departing storm. When athunderstorm passes near by to the north of you, you willoften have a north wind that blows out several miles from. Fig. 140.—Outflowing winds at the ground often occurring on allsides of a summer thunderstorm. Not all these winds are present withevery storm. This is a top view of a thunderstorm area. The lengthand width of a storm may be either greater or less than shown in thefigure. the storm. And when a storm passes near on the south ofyou, a similar wind often blows out from the south. If thestorm stood still perhaps all these winds would have aboutthe same force. But most thunderstorms are moving, and sothe winds in front are usually the strongest. (Why?) The the storm cloud and its light is reflected from the under side of thecloud, giving the whole sky a brilliant pink or golden glow. A faintercoloring is sometimes caused in fair weather by a sheet of cirrus orcirro-stratus over the east or southeast sky while the sun sets clouds sometimes hide such sunsets and are lighted up by thereflected glow from the higher clouds. 184 THE WEATHER warm air that bui
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
