The maximum difference in output for any given input (within the specified range) when the value is approached first with increasing, and then with decreasing, input signals. Caused by energy absorption in the elements of the measuring instrument. Usually ...

Reduction of visibility by strong winds blowing across dry ground with little or no vegetation. Visibilities of 1/8 mile or less over a widespread area are criteria for a Blowing Dust Advisory.

A recording anemometer.

A definite portion of a stream channel, commonly taken between two gauging stations, but may be taken between any two specified points.

A unit of energy equal to 101 ergs or to 0.2389 calories.

An instrument of the aspiration condenser type which measures the concentration and mobility of small ions.

Lacking a relationship to a time base or clock. In asynchronous communications, individual data characters are sent at an arbitrary rate.

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

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 ...

The direction from which the wind is blowing, measured in points of the compass or in azimuth degrees.

A recording variometer.

Temperature of equilibrium between the liquid and vapor phases of a substance at a given pressure.

Same as ceiling light.

A severe weather condition characterized by low temperatures and strong winds bearing a great amount of snow, either falling or picked up from the ground.

A balloon designed to float at a constant pressure level. This may be accomplished by a pressure valve which controls the release of ballast so as to maintain flight above a selected pressure level until the supply of ballast is exhausted. See Moby Dick b ...

The record of an aneroid barograph.

Instrument for measuring the intensity of radiant energy. Its principle is based on the variation of electrical resistance, with the incoming radiation, of one or both the metallic strips which the instrument comprises.

A radar term for a single pulse of radio energy.

A temperature scale with the ice point at 273 degrees and boiling point of water at 373 degrees. It is intended to approximate the Kelvin temperature scale with sufficient accuracy for many sciences, notably meteorology.

Readily taking up and retaining moisture.