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.

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. Developed in 1805 by Sir Francis Beaufort, U.K. Royal Navy. Force Wind (Knots) WMO Classification Appearance of Wind Effects ... -like: Calm, smoke rises vertically: 1: 1-3: Light Air: Scaly ripples, no foam crests: Smoke drift indicates wind direction, still wind vanes: 2: 4-6: Light Breeze: Small wavelets, crests glassy ...

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.

Wind felt strongly on face. Smoke rises at about 30 deg. Slack halyards whip while bending continuously to leeward. Taut halyards maintain slightly bent position.

Beaufort Wind Chart – Estimating Winds Speeds Beaufort MPH Number Range Average Terminology Description 0 0 0 Calm Calm. Smoke rises vertically. 1 1-3 2 Light air Wind motion visible in smoke. 2 4-7 6 Light breeze Wind felt on exposed skin. Leaves rustle. 3 8-12 11 Gentle breeze Leaves and smaller twigs in constant motion.

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...

Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind. Whole trees in motion. Inconvenience felt in walking against wind.

Oct 19, 2023 · 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 .

Jan 5, 2025 · Beaufort scale, scale devised in 1805 by Commander (later Admiral and Knight Commander of the Bath) Francis Beaufort of the British navy for observing and classifying wind force at sea. Originally based on the effect of the wind on a full-rigged man-of-war, in 1838 it became mandatory for log entries in all ships in the Royal Navy .