Illinois Weather Trivia for November 4th

11/4/2010
Radiosondes are weather instruments that measure temperature, humidity, and barometric pressure of the atmosphere. These radiosondes are carried into the sky using weather balloons filled with helium or hydrogen. When inflated, the balloon is about 4-5 feet in diameter and several feet high. However, as the balloon ascends, the decreased effects of barometric pressure cause the balloon to expand. It will usually pop at an elevation close to 100,000 feet off the ground. By this time, the balloon is about the size of a small house.

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  • Web Site Owner:
  • National Weather Service
  • Central Illinois Weather Forecast Office
  • 1362 State Route 10
  • Lincoln, IL 62656
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  • Page Author: ILX Webmaster
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  • Page last modified: 13-Sep-2010 5:47 PM UTC