9.8K views · 107 reactions | The Fujita Scale is used to estimate the wind speed within a tornado. We explain the scale and where it originated. #AccuWeatherReady | AccuWeather | Facebook

....Wind up to 40 knots (74km/h) 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. 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 below and that you hear quoted in wea