A recording hair hygrometer.

The difference between downward and upward (total) radiation; net flux of all radiation.

Same as rain gauge.

An instrument used to indicate wind direction.

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

Operation mode of a communication circuit in which each end can transmit and receive, but not simultaneously.

The point (physical and/or electrical) where two distinct data processing elements meet.

Determined by weighing a special type of wooden stick that has been exposed in the woods, its weight being proportional to its contained water.

The state of the weather with respect to its effect upon the kindling and spreading of forest fires.

The difference between the input quantity applied to a measuring instrument and the output quantity indicated by the instrument. The inaccuracy of an instrument is equal to the sum of its instrument error and its uncertainty.

Pertaining to the action or effect of the wind. Derived from the name of the Greek god of the winds, Aeolus.

Radiation with wavelengths less than 4 microns.

Erasable Programmable Read Only Memory. Programable read-only memory which can be erased, usually by ultraviolet light, and re-programmed.

Companion to the wet-bulb thermometer in a psychrometer. Used to measure ambient air temperature.

Name applied to a class of instruments which measure the liquid content of the atmosphere.

Precipitation composed of white or translucent ice crystals, chiefly in complex branched hexagonal forms.

Same as altimeter setting.

Sustained winds greater than or equal to 40 mph or gust greater than or equal to 58 mph.

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 ...

Based upon damage patterns, classifies twisters into six categories of wind speed (F0 thru F5), ranging from 40 to 318 mph estimated wind speed.