A reversing thermometer which is encased in a strong glass outer shell that protects it against hydrostatic pressure. Compare to unprotected thermometer.

A conductor or system of conductors for radiating and/or receiving radio energy. Also called aerial.

A measure, proposed by Angstrom, of the precipitation effectiveness of a region.

A sunshine recorder of the type in which the time scale is supplied by a chronograph. It consists of two bulbs, one of which is blackened, which communicate through a glass tube of small diameter. The tube is partially filled with mercury and contains two ...

The stage on a fixed river gauge at which it is necessary to begin issuing warnings or river forecasts if adequate precautionary measures are to be taken before flood stage is reached.

Water condensed onto objects at or near the ground, due to the fact that their temperatures have fallen below the dew point temperature of the surrounding air, but not below freezing.

Radiation with wavelengths less than 4 microns.

Precipitation of white, opaque, spherical or conical ice particles that are crisp and easily crushed and that have diameters of 2 to 5 mm.

A magnetometer of the electromagnetic type which is used to measure the horizontal intensity of the earth's magnetic field.

A line of equal or constant temperature.

Nested Grid Model generated every 12 hours by NCEP.

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.

In folklore, a name for rain.

The part of a measuring instrument which responds directly to changes in the environment.

A cover which fits over a large inflated balloon to facilitate handling in high or gusty winds.

in folklore, a name for fire.

The source of illumination for an antenna reflector. Also called antenna feed.

An instrument which automatically records the measurement of two or more meteorological elements.

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

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