Water Vapor Images estimating moisture
Darker colors indicate drier air while the brighter the shade of white, the more moisture in the air. In the image above, very dry air was present from Oklahoma into Illinois (indicated by the dark colors).
Water vapor or water vapour, also aqueous vapour, is the gas phase of water. On the Earth, water vapor is one state of the water cycle within the hydrosphere.
water vapor"(Also called aqueous vapor, moisture.) Water substance in vapor form; one of the most important of all constituents of the atmosphere.
water vapor channel
wavelength
The distance between successive maxima (crests) or minima (troughs) of a wave train, measured along the direction of wave propagation. The wavelength is one of the ways used to identify wave phenomena.
Water Vapor - water in a gaseous (vapor) form
Waterspout - a funnel-shaped or tubular column of rotating cloud-filled wind usually extending from the underside of a cumulus or cumulonimbus cloud down to the surface of an ocean or lake ...
Water Vapor Plume This appear in the water vapor satellite imagery. It is a plume-like object that extends from the Intertropical Convergence Zone (ITCZ) northward or southward into the higher latitudes.
WATER VAPOR (H2O)
Water in gaseous form. It is one of the most import constituents of the atmosphere. Due to its molecular content, air containing water vapor is lighter than dry air.
Water Vapor Imagery - One of the major channels of the operational weather satellites. This channel detects upper level moisture, and can often be diagnosed for upward vertical motion, shortwaves, and potential vorticity.
Water Vapor- water substance in a gaseous state that comprises one of the most important of all the constituents of the atmosphere.
Weather Synopsis- a description of weather patterns affecting a large area.
Water vapor Water in a vapor (gaseous) form. Also called moisture.
Wave cyclone An extratropical cyclone that forms and moves along a front. The circulation of winds about the cy clone tends to produce a wavelike deformation on the front.
water vapor—Water in the invisible gaseous form.
wave cyclone—A cyclone which forms and moves along a front. The circulation about the cyclone center tends to produce a wavelike deformation of the front.
Water Vapor (aka moisture) Water in a gaseous form.
Wave 1. In electricity, a periodic variation of an electric current or voltage. 2.
Water Vapor
Water in a gaseous (vapor) form especially when below boiling temperature and diffused.
Weather Glossary Search Page ...
Water vapor- Water in the form of a gas.
Weather- The condition of Earth's atmosphere at a particular time and place.
Wind-chill factor- Increased cooling caused by the wind.
Water Vapor- The invisible gaseous form of water.
Wave- A small cyclonic circulation in the early stages of development that moves along a cold front.
Weather- The conditions in the atmosphere at any given time.
Water Vapor - It's a gas in the atmosphere. There is very little of it in the air. Water vapor is only 1 to 4% of the atmosphere, but without it we would have no clouds, rain, or snow.
WATER VAPOR - The invisible gaseous state of water. In satellite terminology, water vapor imaging uses an electomagnetic spectrum so that the moisture in the air can be seen.
**Water vapor is less at the poles and most at the equator**
The small amount of water vapor (about 4 percent). in the atmosphere, contributes to our changing weather. Add water vapor to the atmosphere and the pressure lowers.
Rain: Water vapor condensed in the atmosphere that falls to the earth in the form of drops (more than 0.5 mm [1/50 inch] in diameter). Depending on the average cycle of its accumulation in the rain gauge, it can be light (up to 2.5mm), moderate 2.
Frost - Water vapor which deposits directly as a solid on a surface colder than the surrounding air and which has a temperature below freezing. It is not frozen dew. A Killing Frost is a frost severe enough to end the growing season.
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, and the Gulf of Mexico, ...
Precipitable water vapor(6)
The depth of water that would result if all the vapor in the atmosphere above a location were condensed into liquid water.
Precipitation(6) ...
HUMIDITY: Water vapor content of the air; may be expressed as absolute humidity, specific humidity, relative humidity, or mixing ratio.
Refers to the water vapor content in the atmosphere, or the total water, liquid, solid or vapor, in a given volume of air.
Moisture Advection
Transport of moisture by horizontal winds.
The amount of water vapor in the air. It is often confused with relative humidity or dew point.
Related terms: absolute humidity, relative humidity, and specific humidity
HURRICANE ...
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.
The process where water vapor condenses in the atmosphere to form water droplets that fall to the Earth as rain, sleet, snow, hail, etc.
Precipitation Attenuation ...
Fog - condensed water vapor or a cloud floating close to the ground and likely to obscure visibility.
Force - Push or pull that gives energy to an object, sometimes causing a change in the motion of the object.
Dew - Moisture from water vapor in the air that has condensed on objects near the ground, whose temperatures have fallen below the dewpoint temperature.
CondensationThe process by which water vapor becomes a liquid; the opposite of evaporation, which is the conversion of liquid to vapor. In Australia, it is described as a change from a gas to a liquid.
weather satellites, such as GOES9, includes upper air temperatures and humidity, recording the temperatures of cloud tops, land, and ocean, monitoring the movement of clouds to determine upper level wind speeds, tracing the movement of water vapor, ...
Saturation The condition of the atmosphere when the amount of water vapor present is the maximum possible at the existing temperature.
SnowPrecipitation in the form of ice crystals, mainly of intricately branched, hexagonal form and often agglomerated into snowflakes, formed directly from the freezing [deposition] of the water vapor in the air.
Three feedback mechanisms which affect global temperature change include cloud height and amount, snow and ice distribution, and atmospheric water vapor levels.
PRECDPrecedePrecipitable WaterMeasure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column over a given location, usually extending from the surface to 300 mb.
Acid PrecipitationPrecipitation, such as rain, snow or sleet, containing relatively high concentrations of acid-forming chemicals that have been released into the atmosphere and combined with water vapor; harmful to the environment.
sampling frequencyThe maximum amount of water vapor necessary to keep moist air in equilibrium with a surface of pure water or ice. It represents the maximum amount of water vapor that the air can hold at any given temperature and pressure.
Mixing RatioThe ratio of the weight of water vapor in a specified volume (such as an air parcel) to the weight of dry air in that same volume.
Theta-e(or Equivalent Potential Temperature) - The temperature a parcel of air would have if
a) it was lifted until it became saturated,
b) all water vapor was condensed out, and
c) it was returned adiabatically (i.e.
general circulation models Hydrodynamic models of the atmosphere on a grid or spectral resolution that determine the surface pressure and the vertical distributions of velocity, temperature, density, and water vapor as functions of time from the ...
precipitable water - (Or precipitable water vapor.) The total atmospheric water vapor contained in a vertical column of unit cross-sectional area extending between any two specified levels, ...
The method is emperical and considers a number of parameters (ingredients) which cause snowfall, including vertical velocity (upward lift which carries air aloft to a condensation level) and mixing ratio (the mass of water vapor per mass of dry air ...
HYDROMETEOR Any any form of atmospheric water vapor, including those blown by the wind off the earth's surface. Liquid or solid water formation that is suspended in the air includes clouds, fog, ice fog, and mist.
clouds: a suspended mass of water vapor in the atmosphere. Clouds can be categorized into two general groups: cumulus clouds (tall, cotton ball) and stratus clouds (layered); ...
water molecules absorb 540 calories per gram to change from the the liquid (water) state to the gaseous (water vapor) state at 100 °C ...
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.
The partial pressure of water vapor in an air-water system.
NOAA National Weather Service - Cite This Source - This Definition ...
frost: 1) a cover of ice crystals produced when atmospheric water vapor is deposited directly on a surface when the temperature is below freezing, 2) the condition that exists when the temperature of the earth's surface and earth-bound objects ...
An instrument used to measure the water vapor content of the atmosphere in which wet and dry bulb thermometers are mounted on a frame connected to a handle at one end by means of a bearing or a length of chain.
Condensation: Change from water vapor to liquid water.
Conduction: The transfer of energy from one object to another due to the random motions of molecules.
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.
FROST: Ice crystals produced from water vapor that has frozen on a surface at or below 32ºF/0ºC.
FROST/FREEZE WARNING: Below-freezing temperatures are expected during the growing season and may cause significant damage to plants and crops.
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 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.
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.
HUMIDITY: The amount of water vapor in the atmosphere. (See relative humidity).
HURRICANE: A severe tropical cyclone with wind speeds in excess of 74 mph (64 knots).
Absolute Humidity - The mass of water vapor per volome of air (usually expressed as grams of water vapor per cubic meter of air).
PRECIPITABLE WATER (PW, PCPTBL WTR or H2O)- Total amount of water vapor in a layer of air, expressed in inches. Normally taken between 1000 and 500 mb.
Mass of water droplets or ice crystals caused by water vapor in the atmosphere condensing or freezing. See Fig. 1 below for an animation and explanation of how clouds form over mountains.
Fig. 1 ...
Condensation - The physical process by which water vapor in the atmosphere changes to liquid in the form of dew, fog or cloud; the opposite of evaporation.
CONUS - Continental United States ...
 See also: Water, Air, Atmosphere, Temperature, Weather
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