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Beaufort scale
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   Also found in: Encyclopedia, Wikipedia 0.02 sec.

Beaufort scale

System of recording wind velocity, devised by Francis Beaufort in 1806. It is a numerical scale ranging from 0 to 17, calm being indicated by 0 and a hurricane by 12; 13–17 indicate degrees of hurricane force.

In 1874 the scale received international recognition; it was modified in 1926. Measurements are made at 10 m/33 ft above ground level.



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Cold weather and calm winds are helping firefighters in their battle against a wildfire in Southern California.
D) Calm winds and rain prevented the fires from spreading out of control.
Weather conditions were expected to improve later on Friday, with calm winds and higher humidity forecast, officials from the Texas Forest Service said.
 
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