Beaufort scale - Wikipedia
A ship in a force 12 ("hurricane-force") storm at sea, the highest rated on the Beaufort scale. The Beaufort scale (/ ˈ b oʊ f ər t / BOH-fərt) is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale.
Beaufort Wind Scale - National Weather Service
One of the first scales to estimate wind speeds and the effects was created by Britain's Admiral Sir Francis Beaufort (1774-1857). He developed the scale in 1805 to help sailors estimate the winds via visual observations.
Beaufort Scale - National Weather Service
Small wavelets, still short but more pronounced, crests have glassy appearance and do not break. Wind felt on face. Smoke rises at about 80 degrees. Large wavelets, crests begin to break. Foam of glassy appearance. Perhaps scattered white horses (white caps). Wind extends light flag and pennants. Smoke rises at about 70 deg.
The Beaufort Wind Scale | Royal Meteorological Society
The Beaufort Scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale. Below is a table showing the Beaufort Scale with speeds in knots, miles per hour and kilometres per hour.
Beaufort scale | Definition & Measurements | Britannica
2025年1月5日 · Beaufort scale, devised in 1805 by Commander Francis Beaufort of the British navy for observing and classifying wind force at sea.
Beaufort Wind Scale - NOAA/NWS Storm Prediction Center
Beaufort Wind Scale. Developed in 1805 by Sir Francis Beaufort, U.K. Royal Navy. Force Wind (Knots) WMO Classification Appearance of Wind Effects; On the Water On Land; 0: Less than 1: Calm: Sea surface smooth and mirror-like: Calm, smoke rises vertically: 1: 1-3: Light Air: Scaly ripples, no foam crests:
Beaufort scale - Simple English Wikipedia, the free encyclopedia
The Beaufort scale is a scale for measuring wind speeds. It is based on observation rather than accurate measurement. It is the most widely used system to measure wind speed today.
Beaufort wind force scale - Met Office
The Beaufort scale, which is used in Met Office marine forecasts, is an empirical measure for describing wind intensity based on observed sea conditions. These values refer to well-developed wind...
Beaufort Scale - National Geographic Society
2023年10月19日 · The Beaufort scale, officially known as the Beaufort wind force scale, is a descriptive table. It depicts the force of wind by a series of numbers, typically from 0 to 12. The Beaufort scale goes all the way to 17, but the last five numbers only apply to tropical typhoons .
NOAA's National Weather Service - Glossary
The Beaufort wind scale is a system used to estimate and report wind speeds when no measuring apparatus is available. It was invented in the early 19th Century by Admiral Sir Francis Beaufort of the British Navy as a way to interpret winds from conditions at sea.