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View live wind data from our wind systems at Lymington, Hurst Castle, Highcliffe and Portland Harbour (The 2012 Olympic sailing venue)
These pages are under construction.
There'll be more information here soon about weather terminology and Kestrel FAQ.
The mass of water vapour in a unit volume of moist air of a given temperature and pressure. (unit g/m3)
An instrument for measuring wind speed or air flow
An instrument for measuring atmospheric pressure.
A widely used numerical scale of wind velocity ranging from 0 (calm) to 12 (hurricane). See table
Temperature scale with the ice point of water as 0 and the boiling point as 100 at 1 standard atmosphere pressure. The degree Celsius is equal in magnitude to the Kelvin. The Celsius scale is the same as the centigrade scale. The temperature in Celsius = the temperature in Kelvin - 273.15
The altitude in the standard atmosphere corresponding to a specific air density.
The temperature at which dew or condensation begins to form.
Temperature scale with the ice point as 32 and the steam point as 212. Thus the temperature in Fahrenheit = 32 +1.8 x the temperature in Celsius.
A scale F0 to F6 that indicates the amount of damage a tornado causes.
Unit of pressure used in meteorology. One hectopascal equals 100 Pascals (1 hPa = 100 Pa)
An instrument for measuring humidity.
Unit of thermodynamic temperature. 1/273.16 of the thermodynamic temperature of the triple point of water.
Old unit of pressure, now replaced by the hectopascal. (1 mbar = 1 hPa)
SI unit of pressure defined as the pressure which applied on a plane area of one square metre, exerts perpendicularly at this surface a total force of one Newton.
The ratio, expressed as a percentage, of the actual vapour pressure to the saturation vapour pressure.
Mass of water vapour per unit mass of humid air. (unit g kg -1)
A semiconductor device who's electrical resistance changes with temperature.
The virtual temperature is the temperature of dry air that would have the same density and pressure as the moist air.
The temperature of the wet thermometer bulb in a wet and dry bulb hygrometer. The wet bulb is surrounded by wet fibres and evaporation of water from the fibres cools the wet bulb. The rate of evaporation depends on the relative humidity of the air.
The chilling effect of the wind can be represented by the lower temperature that would be required to produce the same chilling sensation for a person walking in calm conditions. This is known as the wind chill equivalent temperature and is an important indicator in assessing the comfort of personnel spending periods outdoors. It is not an indication that an unheated inanimate object will cool below the ambient air temperature. See table
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