The range through which the input may be varied without initiating a response. Usually expressed as a percentage of full-scale range.

An instrument used to measure the amount of dew formed on a given surface.

Liquid water at temperatures colder than freezing.

Same as rain-intensity gauge.

A faintly-colored circular arc similar to a rainbow but formed on fog layers containing drops whose diameters are 100 microns or less. Also called mistbow, white rainbow.

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

A class of instruments employed to determine the electric potential at a point in the atmosphere, and ultimately the atmospheric electric field.

The gravity flow of water within soil.

Rate of flow of water past a point in a stream, expressed as volume per unit time, i.e. cubic feet per second.

The inherent imprecision of a given process of measurement, the unpredictable component of repeated independent measurements of the same object under sensibly uniform conditions.

Wind with a speed between 17 and 21 knots (19 and 24 mph); Beaufort scale number 5.

An instrument which determines the black-body temperature of a substance by measuring its thermal radiation.

A navigational aid used to facilitate the landing of an aircraft at an airport in instrument weather, i.e. low visibility.

A wind scale adapted by the U.S. Forest Service for use in the forested areas of the northern Rocky Mountains (NRM). It is an adaptation of the Beaufort wind scale. The difference between these two scales lies in the specification of the visual effects of ...

A recording magnetometer.

The change in barometric pressure within a specified period of time (typically 3 hours for meteorological observations).

A photometer that measures the received intensity of a distance tight source.

A defective maximum thermometer of the liquid-inglass type in which the mercury flows too freely through the constriction. Such a thermometer will indicate a maximum temperature that is too low.

A type of climatic diagram whose coordinates are some form of temperature vs. a form of humidity or precipitation.

The time required for an instrument to registe 63.2% of a step change in the variable being measured.