Force wind-Wind with a speed above 64 knots (73 mph); Beaufort scale numbers 12 through 17.

Diffuse solar radiation which has the same intensity in all directions.

Eluding precise prediction, completely irregular.

A device which surrounds a rain gauge and acts to maintain horizontal flow in the vicinity of the funnel so that the catch will not be influenced by eddies generated near the gauge. See Alter shield, Nipher shield, Wild fence.

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

Same as wave pole.

A general term for instruments designed to measure the speed or force of the wind.

Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.

In a system of moist air, the dimensionless ratio of the mass of water vapor to the total mass of the system.

An empirical curve relating stream discharge or stage at a point on a stream to discharge or stage at one or more upstream points and, possibly. to other parameters. Also called stage relation.

Abbreviation for binary digit. The smallest unit of information, equal to one binary decision, i.e. 1/0, on/off, yes/no.

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,

A synoptic code approved by the World Meteorological Organization in which the observable meteorological elements are encoded and transmitted in "words" of five numerical digits length. Often abbreviated synoptic code.

Electromagnetic radiation lying within the wavelength interval to which the human eye is sensitive, the spectral interval from approximately 0.4 to 0.7 microns (4000 to 7000 angstroms). Bounded on the short-wavelength end by ultraviolet radiation and on t ...

Temperature assumed by an unsaturated air parcel when brought adiabatically to a standard pressure (1,000 mb).

The portion of the strearnflow during any month or year derived from precipitation in previous months or years.

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

Air in motion relative to the surface of the earth. Almost exclusively used to denote the horizontal component.

A graphical representation of stage or discharge at a point on a stream as a function of time.

Abbreviation for precipitation-evaporation quotient.