Wind Speed by Eye on the Beaufort Scale (1925 Table)

Without an instrument, judge the wind by what it does: smoke, leaves, twigs, branches, whole trees. Match it to a Beaufort number and the notebook gives the speed in miles per hour and metres per second. Result: the wind force 0-12 and its probable speed at 10 m above open ground. Source: Australian Meteorological Observer's Handbook (1925), pp. 45-46, after the Meteorological Office report of 1906. Picture: the table itself.

Beginner

15 minutes

Instructions

Stand in the open

Go to an exposed spot, or one with trees and similar objects in view on which the wind's effect can be seen. The table's speeds are for 10 m (33 ft) above open, level, grassy ground.

Tools needed:

Atmospheric Air - Earth

Match what you see

Read the land descriptions in the notebook (smoke rises vertically, leaves rustle, small trees sway...) and pick the number that fits. Estimates by eye cannot be very precise.

Tools needed:

Atmospheric Air - Earth

Look up the speed

Loading Jupyter Notebook...

Tools needed:

Atmospheric Air - Earth

Tools Required

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Atmospheric Air - Earth
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