The atmospheric pressure at the level of the barometer. May or may not be the same as station pressure.

A fixed support for mounting maximum and minimum thermometers of the liquid-in-glass type. The support holds the thermometers at the correct operating attitude and also permits their rotation for resetting when desired.

Same as fogbow.

In folklore, a name for wind.

A pointed device which indicates the amount of resistance encountered when it is forced into a material such as snow or soil. See ram penetrometer.

meter-An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer. It consists of a constant- intensity collimated light source located at a suitable distance from a photoelectric cell. Variation in the turbidity of the atm ...

Wind with a speed between 56 and 63 knots (64 and 72 mph); Beaufort scale number 11.

The group of bits which a computer processes as a unit; often, 8 bits.

Anemometer which measures wind speed by the speed of rotation of 3 or 4 hemispherical or conical cups, each fixed to the end of a horizontal arm projecting from a vertical axis. See condenser-discharge anemometer, contact anemometer. Compare to bridled-cu ...

See foehn.

The temperature at which an object gives out as much radiation as it receives from its surroundings.

An instrument for studying, or examining substances in, polarized light. See Savant polariscope.

Name given to the unit of pressure in the International System of Units (SI). Equal to 1 newton/meter2 or 0.01 millibar.

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

Name applied to a class of instruments which measure the liquid content of the atmosphere.

Dihydrogen oxide, molecular formula H2O.

A current meter consisting of six conical cups, mounted around a vertical axis, which rotate and generate a signal with each rotation. Tail vanes and a heavy weight stabilize the instrument.

The humidity transducinu element in a Diamond-Hinman radiosonde. Also called electrolytic strip.

A set of electrical conductors, often on a backplane, that carry data and power signals among the various components of a computer.

General name for a type of instrument which measures the inclination of the wind to the horizontal plane. See bivane.