One of the first scale to estimate wind speeds and their effects was created by Rear Admiral Sir Francis Beaufort (1774-1857) of the British Royal Navy. He developed the scale in 1805 to help sailors to estimate the winds through visual observations.
The scale starts with 0 and goes to a force of 12. Initially the scale was only meant to be used only at sea. But today it describes conditions on land as well and is accepted as the standard in wind speed estimation.
Scales
Scale 0- 0-2 km/hr
Scale 1- 3-5 km/hr-Light Air
Scale 2- 6-11 km/hr-Light Breeze
Scale 3- 12-19 km/-Gentle Breeze
Scale4- 20-29 km/hr-Moderate Breeze
Scale 5- 30-39 km/hr-Fresh Breeze
Scale 6- 40 -50 km/hr-Strong Breeze
Scale 7- 51-61 km/hr-Near Gale
Scale 8- 62-74 km/hr-Gale
Scale 9- 75-86 km/hr- Strong Gale
Scale 10- 87-101 km/hr-Storm
Scale 11- 102-120 km/hr-Violent Storm
Scale 12- Over 121 km/hr
By,
N.T.Ganatma
STUNTS Member
Sunday, January 17, 2010
Subscribe to:
Posts (Atom)
