NEXt Generation RADar. A NWS network of about 140 Doppler radars operating nationwide.

An aneroid barometer arranged so that the deflection of the aneroid capsule actuates a pen which graphs a record on a rotating drum. Sometimes called aneroidograph.

In folklore, a name for wind.

An instrument for determining the direction from which radio waves approach a receiver. It may consist of a manually operated direction indicator, or it may use a servo system to position the antenna automatically in the direction of the incident waves.

Defect in the action of an aneroid barometer resulting in a sluggish adjustment of the index toward the correct reading when the barometer is subjected to a large and rapid change in pressure.

The distance or length of flow of the air past a point during a given interval of time.

A conically shaped, copper rain gauge shield.

Same as instrument shelter.

An instrument for recording global solar radiation.

Same as marine rainbow.

A thermometer with a muslin-covered bulb which is moistened. used to measure wet-bulb temperature.

An instrument which measures the effective terrestrial radiation. See Angstrom pyrgeometer.

Extended Binary Coded Decimal Interchange Code. A standard code used to represent data using 8 bits per character.

A common type of liquid-inglass thermometer, used, in meteorology, in psychrometers and as a maximum thermometer.

The statement that the viscosity of air is independent of the density of air.

Precipitation caused by the ascent of moist air over an orographic barrier such as a Mountain range.

A cup anemometer with its shaft mechanically coupled to a magneto.

An instrument used to reveal but not necessarily measure the presence of an electrical quantity. It is used to display the output of a sensing element after suitable amplification and modification. Sometimes called display.

A thermometer which uses a transducing element whose element proper-ties are a function of its thermal state. Common meteorological examples of such thermometers are the resistance thermometer and the thermoelectric thermometer.

A common unit used in measurement of atmospheric pressure. Defined as that pressure exerted by a one-inch column of mercury at standard gravity and a temperature of 0'C.