Note that the scale applies to sustained (average) wind speeds. Initially it was based on the condition of the sea however the modern Beaufort scale incorporates land observations too. The Beaufort Scale was developed as a common way to measure and describe wind speed prior to any accurate devices. However, it is generally felt that wind gusts should not take into account their height from ground level therefore a multiplier of 1 is acceptable. In addition to a Wind Speed multiplier, Cumulus allows for a Wind Gust multiplier.You should also ask Cumulus to calculate wind chill, because any value output by your weather station will be based on an uncompensated wind speed. Note Cumulus only accepts two decimal places if you have calculated using the formula rather than the table. Locate the 'Windspeed multiplier' and change this from its default of 1 to the value from above. Within Cumulus click the 'Configuration' menu then 'Calibration'.Remember you are measuring the height of your anemometer from the ground in metres. Use the formula above (or the table of examples) to locate your multiplier. Within Cumulus it is possible to set a multiplier which will be used to upscale your actual reading from your anemometer to take into account its lower height.

It is generally accepted that the following formula will provide a multiplier to compensate for lower height anemometer (where h is the height of the anemometer in metres above ground level). Raising an anemometer to a height of 10 metres in an open space requires a strong mast with tensioned wires, and is not always possible, especially for weather enthusiasts, therefore one must build in a compensation figure (or multiplier) in order to take into account the height factor. For Oregon Scientific and La Crosse stations see FAQ: How do I set up recording wind speeds in Cumulus with Oregon Scientific and La Crosse stationsДЄs it says at FAQ#Where_should_I_position_the_wind_sensors the UK expects an anemonmeter to be 10m agl.If you have a Fine Offset station, see FAQ: What do the various wind speeds in Cumulus correspond to with Fine Offset stations.If you have a Davis weather station see FAQ: What do the various wind speeds in Cumulus correspond to with Davis stations.The measurement is sometimes made in knots but any speed unit is possible.Д = m/s (metres per second) 1 = mph (miles per hour) 2 = km/h (kilometres per hour) 3 = kts (nautical knots) Weather Stations and Cumulus Several readings should be taken over a couple of minutes and an average taken. The stronger the wind the faster the cups rotate and the higher the reading. It is typically made up of cups attached to spindle.

Wind speed is measured using an anemometer.

An anemometer measures