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Sir Francis Beaufort. The scale that carries Beaufort's name had a long and complex evolution from the previous work of others (including Daniel Defoe the century before). In the 18th century, naval officers made regular weather observations, but there was no standard scale and so they could be very subjective — one man's "stiff breeze" might be another's "soft breeze"—: Beaufort succeeded ...
Historically, the Beaufort wind force scale, created by Francis Beaufort, provides an empirical description of wind speed based on observed sea conditions. Originally it was a 13-level scale (0–12), but during the 1940s, the scale was expanded to 18 levels (0–17). [ 21 ]
The scale was tested from 1972 to 1975 and was made public at a meeting of the Royal Meteorological Society in 1975. The scale sets T0 as the equivalent of 8 on the Beaufort scale and is related to the Beaufort scale (B), up to 12 on the Beaufort scale, by the formula: B = 2 (T + 4) and conversely: T = B/2 - 4
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Pages for logged out editors learn more. Contributions; Talk; Beaufort Wind Scale
I was going by the description "high sea waves from 7 – 9 meters", which compares with > 14 m for a hurricane on the Beaufort Scale. In any case, the Beaufort scale is defined by the descriptions, not the wind speeds. The descriptions are different. Therefore by definition it is not the Beaufort scale.