Humidity Definitions
Humidity is essentially the number of water vapour molecules in the air, but there are many and varied ways of expressing it.
Humidity - Generally, a measure of the water vapor content of the air. Popularly, it is used synonymously with relative humidity.
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Humidity 1) Water vapor content of the air. 2) Some measure of the water-content of air. See absolute h., relative h., specific h., dew point.
Humidity can make the warmth of the surrounding air feel as if it is warmer than the actual temperature would suggest, because the cooling effect of evaporation from the skin is reduced.
Relative humidity may be defined as the ratio of the water vapor density (mass per unit volume) to the saturation water vapor density, usually expressed in percent:
Relative Humidity (RH) = ...
humidity strip"(Also called electrolytic strip.) A flat plastic strip bounded by electrodes on two sides and coated with a hygroscopic chemical compound such as lithium chloride.
humidity
A generic term describing the amount of water vapor contained in the air, but not considering any liquid or ice content.
Humidity
relative humidity = (the actual water vapor content of the air) divided by (the maximum water capacity for that temperature) ...
humidity - 1. Generally, some measure of the water vapor content of air.
Humidity - some measure of the water vapor content of the air
Hurricane - a tropical cyclone with winds exceeding 66 knots, generally accompanied by rain, thunder, and lightning ...
humidity: is the quantity of water vapor in the air. Relative humidity is the ration between the actual quantity of watervapor and the amount of watervapor that the air can hold at a given temperature.
HUMIDITY
The amount of water vapor in the air. It is often confused with relative humidity or dew point.
HUMIDITY: The amount of water vapor in the atmosphere. (See relative humidity).
Humidity Recovery
The change in relative humidity over a given period of time; generally between late evening and sunrise. The moisture change in the fine fuels during this period is directly related to the amount of humidity recovery.
humidity: the measure of how much water there is in the air.
hurricane: a severe tropical cyclone with maximum 1-minute sustained surface wind speeds greater than 74 mph.
Humidity- the amount of water vapor present in the air.
Hurricane- a tropical cyclone with sustained winds over seventy-four mph.
Humidity
Water vapor content of the air.
Hurricane
Name given to a warm core tropical cyclone with maximum surface wind of 118 km/h (64 knots, 74 mph or greater hurricane force wind) in the North Atlantic, the Caribbean, ...
Humidity - A general term referring to water vapor in the air.
Humid Subtropical Climate - A climate generally located on the eastern side of a continent and characterized by hot, sultry summers and cool winters.
humidity—Water vapor content of the air; may be expressed as specific humidity, relative humidity, or mixing ratio.
hurricane—A tropical cyclone in the Western Hemisphere with winds in excess of 65 knots or 120 km/h.
Humidity The amount of water vapor in the air. The higher the temperature, the greater the number of water molecules the air can hold. For example: at 60 °F (15 °C), a cube of air one yard on each side can hold up to 4.48 ounces of water.
Humidity- A measure of the amount of water vapor in the air.
Hurricane- A tropical storm that has winds of 119 kilometers per hour or higher; typically about 600 kilometers across.
HUMIDITY - The amount of water vapor contained in the air.
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Humidity - The amount of water vapor in the air.
Hurricane - They are intense storms with swirling winds up to 150 miles per hour. Usually around 300 miles across, hurricanes are 1,000-5,000 times larger than tornadoes.
4. Humidity - Vapor Pressure - Saturation Vapor Pressure
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ABSOLUTE HUMIDITY
A type of humidity that considers the mass of water vapor present per unit volume of space. Also considered as the density of the water vapor. It is usually expressed in grams per cubic meter.
absolute humidity- the mass of water vapor in a unit volume of air.
acid rain- rain with an abnormally high acid content caused by burning of fossil fuels, which release sulfur and nitrogen oxides.
Relative Humidity- A measure of the amount of water vapor actually held by a specific volume of air in comparison to the maximum water vapor that air could hold at a constant temperature.
Relative Humidity
The ratio of the vapor pressure to the saturation vapor pressure with respect to water. This quantity is alternatively defined by the World Meteorological Organization as the ratio of the mixing ratio to the saturation mixing ratio.
Relative humidity: the ratio of the actual water vapor pressure at a given time to the vapor pressure that would occur if the air were saturated at the same ambient temperature.
Relative Humidity - a dimensionless ratio, expressed in percent, of the amount of atmospheric moisture present relative to the amount that would be present if the air were saturated.
Relative humidity(4)
An estimate of the amount of moisture in the air relative to the amount of moisture that the air can hold at a specific temperature.
RELATIVE HUMIDITY - Percentage scale based on the difference between temperature and dewpoint. The humidity at 100 percent means the air is saturated as in a cloud or rain. Is often high in tropical regions and very low in deserts. Also called RH.
Absolute humidity
The mass of water vapour in a given volume of air. It represents the density of water vapour in the air. See also Specific humidity, Relative humidity.
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Absolute Humidity: The ratio of the mass of water vapor present in the air to the volume occupied by the gas; the density of water vapour in the air, usually expressed as grams of water vapour per cubic metre of air.
ABSOLUTE HUMIDITY: In a system of moist air, the ratio of the mass of water vapor to the total volume of the system; usually expressed as grams per cubic meter (g/m³ ).
Absolute humidity The mass of water vapor per unit volume of air containing the water vapor; usually expressed as grams of water vapor per cubic meter of air.
Relative Humidity-The ratio of the air's water vapor content to its water water vapor capacity.
RELATIVE HUMIDITY A type of humidity that considers the ratio of the actual vapor pressure of the air to the saturation vapor pressure. It is usually expressed in percentage.
Relative humidity - A ratio of the amount of water vapor that the air is holding to the amount of water vapor the air can hold, which depends on temperature.
Ridge - An area of high pressure. An area of anticyclonically curving winds.
RELATIVE HUMIDITY (RH)- The amount of moisture in the air as a ratio to the maximum amount of moisture that can be evaporated into the air at a constant temperature.
Specific Humidity
In a system of moist air, the ratio of the mass of water vapor to the total mass of the system.
Specific Yield ...
Relative Humidity - The ratio of water vapor contained in the air compared to the maximum amount of moisture that the air can hold at that particular temperature and pressure.
Ridge - An elongated area of high pressure.
absolute humidityThe mass of water vapor in a given volume.absolutely stable airAn atmospheric condition that exists when the environmental lapse rate is less than the moist adiabatic lapse rate.
Climatic elements include precipitation, temperature, humidity, sunshine and wind velocity and phenomena such as fog, frost, and hail storms.
RadiosondeAn instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure and humidity by means of a small, expendable radio transmitter.
It gives the current weather condition in one word (cloudy, rain, snow, fog, etc.), the temperature and dew point in Fahrenheit, the relative humidity, wind speed and direction, and finally additional information (wind chill, heat index, ...
Equipment or services supplied: An extensive range of Classical Meteorological Instrumentation for monitoring temperature, sunshine, airflow, humidity, pressure and rainfall.
Diurnal CyclesVariations in meteorological parameters such as temperature and relative humidity over the course of a day which result from the rotation of the Earth about its axis and the resultant change in incoming and outgoing radiation.
The properties that characterize the climate are thermal (temperatures of the surface air, water, land, and ice), kinetic (wind and ocean currents, together with associated vertical motions and the motions of air masses, aqueous humidity, ...
These measurements of temperature, pressure, humidity and wind throughout the vertical profile of the atmosphere provide the input to a number of numerical forecast models.
Apparent Temperature: The apparent temperature is a measure of human discomfort due to combined heat and humidity. It was developed by Dr. R. G. Steadman in 1979 and is based on studies of human physiology and textile (clothing) science.
The ideal conditions for dew are a still, clear night, high humidity in the air next to the ground, and low humidity in the air above.
Sounding - A set of data measuring the vertical structure of an atmospheric parameter (temperature, humidity, pressure, winds) at a given time.
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It normally has the horizontal dimension of hundreds of miles. The homogeneity of an air mass is produced due to the extended contact, in a region of origin, with the subjacent surface with uniform temperature and humidity.
The subsiding air warms up, its relative humidity falls, and fine weather is the usual accompaniment of subsidence, though fog, stratus or stratocumulus clouds may occur under certain conditions. The contrary case is called convergence.
Apparent TemperatureA measure of human discomfort due to combined heat and humidity (e.g., heat index).Apparent WindThe speed and true direction from which the wind appears to blow with reference to a moving point.
 See also: Temperature, Air, Weather, Water, Pressure
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