The depth of water that would result from the melting of snow or ice, assuming measurement on a horizontal surface and no infiltration or evaporation.

A tube designed to measure the rate of flow of fluids. It consists of a tube having a constriction or throat at its midsection. The difference between the pressure measured at the inlet and at the throat is a function of the fluid velocity. Compare to Pit ...

In folklore, a name for wind.

A conically shaped, copper rain gauge shield.

Nested Grid Model generated every 12 hours by NCEP.

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

An aneroid barometer arranged so that the deflection of the aneroid capsule actuates a pen which graphs a record on a rotating drum. Sometimes called aneroidograph.

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.

Extended Binary Coded Decimal Interchange Code. A standard code used to represent data using 8 bits per character.

An instrument for recording global solar radiation.

A series of Nansen-bottle water samples and associated temperature observations resulting from one release of a messenger.

The condition of the atmosphere when the amount of water vapor present is the maximum possible at the existing temperature.

The lowest temperature that can be obtained on a wet-bulb thermometer in any given sample of air. Obtained by evaporation of water (or ice) from the muslin wick. Used in computing dew point and relative humidity.

A method of winds aloft observation accomplished by tracking a balloon-borne radar target or radiosonde with either radar or a radio theodolite.

A motorlike device containing a rotor and a stator and capable of converting an angular position into an electrical signal, or an electrical signal into an angular position. When several synchros are correctly connected, all of the rotors will align thems ...

A contact anemometer connected to an electrical circuit which is so arranged that the average wind speed is indicated.

Any device or instrument for measuring salinity, especially one based on electrical conductivity methods.

Electromagnetic radiation of shorter wavelength than visible radiation but longer than x-rays, between 0.02 and 0.4 micron (200 and 4000 angstrom).

The level at which ice crystals and snowflakes melt as they descend through the atmosphere.

A type of pressure-plate anemometer in which the plate, restrained by a stiff spring, is held perpendicular to the wind. The wind-activated motion of the plate is measured electrically. The natural frequency of this system can be made high enough so that ...