Gravity wave (gravitational wave) A wave disturbance in which buoyancy (or reduced gravity) acts as restoring force on parcels displaced from hydrostatic equilibrium.
The wave speed is given by:
Where c is the wave speed, u is the mean westerly flow,
β
is the Rossby parameter, and k is the total wavenumber.
Easterly wave - the Hurricane's cradle
Tropical cyclones, e.g. hurricanes, often develop from a shallow disturbance embedded in the general easterly trade wind circulation.
wave - 1. Generally, any pattern with some roughly identifiable periodicity in time and/or space. This applies, in meteorology, to atmospheric waves in the horizontal flow pattern (e.g.
wave vector"The vector k in the solution of a wave equation expressed as the product of a time- varying function and A exp(ik · x), where x is the position vector and A is constant in space and time.
Wave Steepness: The ratio of wave heights to wave length.
Warm Air Advection: Transport of warm air into an area by horizontal winds. Low-level warm advection sometimes is referred to (erroneously) as overrunning.
Wave Height
Generally taken as the height difference between the wave crest and the preceding trough.
Wave Length ...
Wave Period
Time, in seconds for the passage of successive wave crests.
Wave Steepness ...
Wave An identifiable, periodic disturbance or motion in a medium that shows displacement. The most commonly referred medium is water, followed by the atmosphere.
Wave - In meteorology, the intersection of warm and cold fronts.
Weather - State of the atmosphere with respect to heat or cold, wetness or dryness, calm or storm, clearness or cloudiness.
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.
Wave frequency Number of crests or troughs of a wave that pass a given point in a specified period of time, usually 1 second.
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.
Wave- In meteorology any pattern identifiable on a weather map that has a cyclic pattern, or, a small cyclonic circulation in the early stages of development that moves along a cold front.
Wave Crest- The highest point in a wave.
Wave 1. In electricity, a periodic variation of an electric current or voltage. 2.
Heat wave
A period of abnormally hot weather lasting several days.
High pressure ...
Heat Wave- A period of abnormally and uncomfortably hot and unusually humid weather. Typically a heat wave lasts 2 or more days.
LONG WAVE TROUGH
A wave in the prevailing westerly flow aloft which is characterized by a large length and amplitude. A long wave moves slowly and is persistent. Its position and intensity govern weather patterns over a period of days or weeks.
Cold Wave - A rapid and marked fall of temperature. The National Weather Service applies this term to a fall of tern- perature in 24 hours equaling or exceeding a specified number of degrees and reaching a specified minimum tern- perature or ...
COLD WAVE A rapid fall in temperature within twenty-four hours to temperatures requiring substantially increased protection to agriculture, industry, commerce, and social activities.
Long Wave (or Planetary Wave) - In meteorology, a long wave in atmospheric circulation in the major belt of westerlies has different characteristics than rapidly moving storms nearer the Earth's surface ...
Wind Wave- a wave that is caused by the action of wind on the surface of water.
OPEN WAVE- A wave of low pressure that does not have a complete circulation around it; also called a short wave trough.
OUTFLOW BOUNDARY- The outflow of air from thunderstorm(s). They can act like miniature cold fronts. ...
Short-Wave Radiation or Solar Radiation: That portion of the electromagnetic spectrum less than 4,000 nanometres which is received from the sun.
tidal wave: 1) the periodic variations of sea level caused by the moon's pull, and also caused by earthquakes 2) in everyday language, referring to any unusually high and destructive water level along a shore.
wave amplification
Terms for using data resources. CD-ROM available.
Credits and Acknowledgments for WW2010.
Department of Atmospheric Sciences (DAS) at
the University of Illinois at Urbana-Champaign.
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.
Wave height or amplitude
The vertical distance between a wave crest and a trough.
Wave length ...
WAVE CYCLONE - A low pressure system with waves and / or fronts associated with it. Wave cyclones are almost always extratropical type storms associated with frontal systems or upper level disturbances.
A wave of energy sent across space. Examples include heat and light energy
S
Satellite ...
Wave
3. West VirginiaWVHTOn a buoy report, significant wave height (meters) is calculated as the average of the highest one-third of all of the wave heights during the 20-minute sampling period.
HEAT WAVE TO STAY AROUND UNTIL WEEKEND by JENNIFER MAXWELL, The Morning Call ...
Tidal Wave - A destructive and high rise of water along a seashore. Tidal waves are caused by underwater earthquakes, volcanoes or landslides, and have nothing to do with tides.
Swell: Wave (rising and falling of the sea) caused by winds that can be at some distance or that have already stopped.
Synoptic Chart: Chart or map in which selected meteorological elements are represented over a large region at a given moment.
Tropical Wave: A trough or cyclonic curvature maximum in the trade-wind easterlies. The wave may reach maximum amplitude in the lower middle troposphere.
Easterly Wave: A wavelike disturbance in the tropical easterly winds that usually moves from east to west. Such waves can grow into tropical depressions. ...
Short-wave radiation Radiation with wavelengths less than 4 microns. Shower Precipitation from a cumuliform cloud.
Lee WaveThe wavelike effect, characterized by severe updrafts and downdrafts, that occurs in the lee of a mountain range when rapidly flowing air is lifted up the steep front of a mountain range. Compare mountain wave.
Short Wave Fade (SWF)In solar-terrestrial terms, a particular ionospheric solar flare effect under the broad category of sudden ionospheric disturbances (SIDs) whereby short-wavelength radio transmissions, VLF, through HF, ...
LEWP - Line Echo Wave Pattern. A bulge in a thunderstorm line producing a wave-shaped "kink" in the line (Fig. 4). The potential for strong outflow and damaging straight-line winds increases near the bulge, which often resembles a bow echo.
SEA SPRAY Sometimes called salt spray, it is the drops of sea water (salt water) blown from the top of a wave. See blowing spray as a factor in visibility at sea and as a possible condensation nuclei.
Dew PointDPDOn a buoy report, dominant wave period (seconds) is the period with the maximum wave energy.
On many occasions, particularly in mid-latitude/temperate zone regions, the flow is directed more or less directly from west to east, crossing few latitude zones within the same longitude range: this is a 'highly zonal' type - any short-wave ...
reflectivity The ratio of the energy carried by a wave that is reflected from a surface to the energy of a wave incident on the surface.
Thunder - Thunder is produced as a sound wave. Just as friction causes noise when you rub your hands together, massive friction between neighboring air molecules produces the loud noise.
ultraviolet radiationAn electromagnetic radiation with wave-lengths longer than X-rays but shorter than visible light.Unmanned Aerospace Vehicle (UAV) ProgramA U.S.
wind, wave height) through the National Digital Forecast Database (NDFD). NDFD contains a seamless mosaic of digital forecasts from NWS field offices working in collaboration with the National Centers for Environmental Prediction (NCEP).
Wind Ripple or Snow Ripple These terms refer to a type of wave-like formation visible in the snow covered rural landscapes of western Minnesota in the winter.
At night, it cools by radiation for the same reason until it is in equilibrium with the long-wave radiation from the air above it, mostly emitted by water vapor.
Phase - the position along a wave as measured from a reference point on the wave
Planck's Law - the amount of radiation emitted by a blackbody is uniquely determined by its absolute temperature ...
TSUNAMI: An ocean wave generated by a submarine earthquake, volcano or landslide. (Also known as a seismic sea wave, and incorrectly as a tidal wave).
Infrared radiation- A form of energy with wave-lengths that are longer than visible light.
Ionosphere- The lower part of the thermosphere, where electrically charged particles called ions are found.
Flood Crest - Maximum height of a flood wave as it passes a certain location.
Flood Stage - The level at which a stream, river or other body of water begins to or will begin to leave its banks.
A bulge in a thunderstorm line producing a wave-shaped "kink" in the line (Figure 4). The potential for strong outflow and damaging straight-line winds is increased near the bulge, which often resembles a bow echo.
Emittance The rate at which a black body radiates energy across all wave-lengths.
Entrainment The mixing of environmental air into a preexisting air current or cloud so that the environmental air becomes part of the current or cloud.
Right now, scientists are asking the ultimate question - How do the Saharan Air Layer and the African Easterly Wave mingle to create tropical cyclones?
LENTICULAR - A lens shaped cloud associated with mountain wave turbulence.
LIFT - The upward directed aerodynamic forces produced as a wing moves through the air.
COASTAL FORECAST: A forecast of wind, wave and weather conditions between the coastline and 60 miles offshore.
Storm Warning - A marine warning where forecasts call for 50 to 60 kts of wind and turbulent wave conditions.
TROPICAL DEPRESSION: A tropical cyclone in which the maximum 1-minute sustained surface wind is 38 mph or less. They form from a tropical wave or tropical disturbance.
 See also: Surface, Weather, Air, Temperature, Pressure
  
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