Apparatus from which the nature and time of precipitation may be determined.

As used by the U.S. Army Corps of Engineers, the departure (in

Water vapor content of the air. See absolute humidity, dew point, mixing ratio, relative humidity, specific humidity.

Same as altimeter setting.

A decrease in the central pressure of a pressure system. Usually applied to a low rather than to a high.

A recording weight barometer.

Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.

A thermopile used in some types of radiation instruments. See solarimeter.

in folklore, a name for fire.

In general. the severe wind of an intense tropical cyclone (hurricane or typhoon). The term has no further technical connotation, but, unfortunately, is easily conftlsed with the strictly defined hurricane-force wind,

Part of a computer word that has meaning in itself, often, a byte.

An aneroid barograph designed to record atmospheric pressure variations of very small magnitude.

Any soft, gentle breeze.

An instrument for determining the dust content of a sample of air. Also spelled conimeter.

A form of psychrometer with wet-bulb and dry-bulb thermometers mounted on opposite sides of a specialty designed graph of the psychrometric tables. It is so arranged that the intersections of two curves determined by the wet-bulb and dry-bulb readings -yi ...

The atmospheric pressure computed using station elevation as the reference datum level. Station pressure is usually the base value from which sea level pressure and altimeter setting are determined.

Wind with a speed between 11 and 16 knots (13 and 18 mph); Beaufort scale number 4.

For a given location, a measure of the long-range effectiveness of precipitation in promoting plant growth. Also called precipitation-evaporation index.

A systematic summary of the terms (inflow, outflow, and storage) of the storage equation as applied to the computation of soil-moisture changes, ground-water changes, etc. An evaluation of the hydrologic balance of an area. Also called basin accounting, w ...

The most common of the principal rainbow phenomena, which appears as an arc of about 42