Wind with a speed between 28 and 33 knots (32 and 38 mph); Beaufort scale number 7.

Generally, an instrument designed to measure or estimate the blueness of the sky. See Linke-scale.

A type of cyanometer. an instrument used to measure the blueness of the sky. The Linke-scale is simply a set of eight cards of different standardized shades of blue. They are evenly numbered 2 to 26. The odd numbers are used by the observer if he or she j ...

A general term to designate apparatus designed to observe the details of weather during thunderstorms.

See gain.

A unit of signaling speed representing the number of code elements sent per second; often, bits per second.

Anemometer whicb measures wind speed by measuring the degree of cooling of a metal wire heated by an electric current. A type of cooling power anemometer.

An estimate of the temperature of an incandescent body, determined by observing the wavelength at which it is emitting with peak intensity (its color) and using that wavelength in Wien's law.

A chronograph used to make a time-record of certain measured meteorological elements. The most common type, the triple register, records wind direction and speed, duration of sunshine, and amount of rainfall (sensed respectively by a contact anemometer, M ...

A medium-sized instrument shelter. It is a white louvered box with a flat double to of and is mounted four feet above the ground on a four-legged stand.

A c.g.s. (centimeter-gram-second) unit of mass. Originally defined as the mass of 1 cubic centimeter of water at 4

The maximum positive and negative deviation observed in testing a device under specified conditions and by a specified procedure. It is usually measured as an inaccuracy and expressed as accuracy, typically in terms of the measured variable, percent of sp ...

A colloquial term in western Australia for a squall, associated with thunder, on the northwest coast in summer.

National Centers for Environmental Prediction. Central computer and communications facility of the National Weather Service; located in Washington, DC.

General term for any device that measures precipitation: principally a rain gauge or snow gauge.

Value of soil moisture, expressed as a percentage of the mass of dry soil, below which a plant living in the soil dies by wilting.

Generally, the relative states of inflow, outflow, and storage of moisture over a given area of earth's surface.

A small pointer extending downward from the top of the cistern of a Fortin barometer. The level of the mercury in the cistern is adjusted so that it just comes in contact with the end of the pointer, thus setting the zero of the barometric scale.

Same as dropsonde.

An absolute temperature scale with the degree of the Fahrenheit scale and the zero point of the Kelvin scale. The freezing point of water equals 491.69