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

Wind with a speed between 22 and 27 knots (25 and 31 mph); Beaufort scale number 6.

An instrument for rapidly obtaining samples of airborne dust; a type of dust counter. Particles pass through a cylindrical chamber, are drawn at high velocity through a narrow slit, and then impinge upon a microscope cover glass located a short distance f ...

Same as dropsonde.

Downward-facing pyranometer used for measuring reflected solar radiation.

A type of cyanometer. an instrument used to measure the blueness of the sky. The Linke-scale is simply a set of eight cards of different standardized shades of blue. They are evenly numbered 2 to 26. The odd numbers are used by the observer if he or she j ...

Winds which, over a small area, differ from those which would be appropriate to the general pressure distribution.

Abbreviation for precipitation effectiveness index.

A relatively small-scale, downward moving current of air.

The process by which water in plants is transferred as water vapor to the atmosphere. Also, the amount of water so transferred.

A recording hair hygrometer.

A form of data transmission in which the bits of each character are sent one at a time along a single communication path. Compare to parallel data transmission.

A numbering system using a base number of 16 and including the ten decimal digits (0 to 9) along with six alpha digits (A to F). Thus. a digit is available to represent each of the possible values of a 4-bit binary digit.

The wind speed and direction at various levels in the atmosphere above the level reached by surface weather observations.

The degree of conformity of an indicated value to an accepted standard value, or ideal value. See accuracy rating, measured accuracy.

An absolute pyhrliometer, developed by C.G. Abbott, in which the radiation-sensing element is a blackened water-calorimeter.

The value of the quantity measured, as indicated or otherwise provided by a measuring instrument.

A unit of pressure which directly expresses the force exerted by the atmosphere. Equal to 1000 dynes/cm2 or 100 pascals.

In folklore, a name for rain.

Same as instrument shelter.