Below is a table showing the Beaufort Scale with speeds in knots, miles per hour and kilometres per hour. Please note that these are mean speeds , usually averaged over 10 minutes by convention, and do not capture the speed of wind gusts.
The wind speeds shown in the table, and that you hear quoted in weather or news reports, are always measured at 10 metres above the ground , using meteorological instruments. The specifications are descriptions of likely observations on land or at sea and the probable and maximum wave heights in meters are quoted for the open sea. The figure for sea state on a scale from is a shorthand way of describing the sea surface conditions to various users. Wind Force. Wind Speed. Probable Wave Height.
Sea State. Smoke rises vertically. Sea like a mirror. Light Air. Direction shown by smoke drift but not by wind vanes. Sea rippled. Light Breeze. Wind felt on face; leaves rustle; wind vane moved by wind.
Small wavelets on sea. Gentle Breeze. Leaves and small twigs in constant motion; light flags extended. Large wavelets on sea. Moderate Breeze. Raises dust and loose paper; small branches moved. Small waves, fairly frequent white horses.
Fresh Breeze. Small trees in leaf begin to sway; crested wavelets form on inland waters. One of the first scales to estimate wind speeds and the effects was created by Britain's Admiral Sir Francis Beaufort He developed the scale in to help sailors estimate the winds via visual observations. The scale starts with 0 and goes to a force of The Beaufort scale is still used today to estimate wind strengths.
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Beaufort Wind Scale. Force Speed Description Specifications for use at sea mph knots Specifications for use on land 0 Calm Sea like a mirror. Calm; smoke rises vertically. Direction of wind shown by smoke drift, but not by wind vanes. Crests have a glassy appearance and do not break. Google Analytics allows us to collect anonymous statistics about visitors. Toggle navigation wind-turbine-models. Winds on the Beaufort scale. How does the Beaufort Scale work?
The steps of the Beaufort Scale are relatively linear to the wind speeds. Beaufort scale with 18 wind speeds In the scale was extended by 5 wind forces.
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