contour line"(Also called contour, isohypse, isoheight.) A line of constant elevation above a certain reference level (usually mean sea level) on a previously defined surface, which may be the earth's surface, a constant-pressure surface, ...
Contour Line - generally, a line of constant value; in meteorology, typically refers to a line of constant elevation above a specified reference level (usually mean sea level) ...
Contour line A line that connects points of equal elevation above a reference level, most often sea level.
Contrail (condensation trail) A cloudlike streamer frequently seen forming behind aircraft flying in clear, cold, humid air.
contouring circuit—On weather radar, a circuit which displays multiple contours of echo intensity simultaneously on the plan position indicator or range-height indicator scope. See contour (2).
Height Contours: Isolines which denote the distribution of equal heights of a particular atmospheric pressure on a constant-pressure map ...
Height contours are represented by the solid lines. The small numbers along the contours are labels which identify the value of a particular height contour (for example 5640 meters, 5580 meters, etc.).
Isodop A contour of constant Doppler velocity values.
Isodrosotherm A line on a chart connecting points of equal dewpoint.
Isohaline A line (or surface) connecting points of equal or constant salinity in water bodies or groundwater.
Map depicting contours of equal precipitation amounts recorded during a specific time period.
Long-range Forecasts
A forecast of weather conditions for a period extending beyond three or more days from the day of issuance.
Combined Shear Contour (CSC): This WSR-88D radar product is a contoured version of Combined Shear (CS) that is displayable alone or as an overlay on reflectivity or velocity products.
Thermal WindIt is a theoretical wind that blows parallel to the thickness lines, for the layer considered, analogous to how the geostrophic wind blows parallel to the height contours.
GEOSTROPHIC WIND A steady horizontal motion of air along straight, parallel isobars or contours in an unchanging pressure or contour field.
Offshore WatersThat portion of the oceans, gulfs, and seas beyond the coastal waters extending to a specified distance from the coastline, to a specified depth contour, or covering an area defined by specific latitude and longitude points.
It is directed along contour lines or isobars. Geostrophic wind level The lowest level at which the wind becomes geostrophic in the theory of the Ekman spiral. Also called gradient wind level.
isotherms and height contours are nearly parallel everywhere and directional wind shear is weak.
Baroclinic Atmosphere:Isotherms move across the isobars or contours.
Barogram:A written record of the atmospheric pressure: (Graph)
Barograph:A weather instrument used to measure atmospheric pressure. It consists of an aneroid cell which ...
A trough on a mean sea level pressure chart, (or an upper air contour chart) can be picked out by an arrangement of isobars (contours) which are concave towards an area of low pressure (low contour height) along a particular axis, ...
IsodopA contour of constant Doppler velocity values.IsodrosothermA line connecting points of equal dew point temperature.IsoheightSame as a contour depicting vertical height of some surface above a datum plane.
On a map of thickness contours, the thermal wind "flows" between the contours; the tighter the contour spacing, the "faster" the thermal wind. This thermal wind is equivalent to the mean wind between the layer it represents i.e.
In such systems, height contours and isotherms are parallel everywhere, and winds do not change direction with height.
As a rule, a true equivalent barotropic system can never be achieved in the real atmosphere.
Sometimes, particularly in discussions of atmospheric waves embedded in the westerlies, a ridge line is considered to be a line drawn through all points at which the anticyclonically curved isobars or contour lines are tangent to a latitude circle.
The isallobar contour interval is usually 1 mb/3hr. The wind is normal to the isallobars, and blows "downhill." Two isallobars are shown, with a distance between them of 100 km.
Thermodynamic Chart (or Thermodynamic Diagram) - A chart containing contours of pressure, temperature, moisture, and potential temperature, all drawn relative to each other such that basic thermodynamic laws are satisfied.
A chart containing contours of pressure, temperature, moisture, and potential temperature, all drawn relative to each other such that basic thermodynamic laws are satisfied.
Isobaric surfaces are used in upper level charts where geopotential heights are contoured to decribe the upper level features. These charts are typically produced at standard levels such as 850hPa, 700hPa, 500hPa etc.
PC-Gridded Interactive Display and Diagnostic System - Allows the forecaster to view fields of gridded model output in contour or vector format. By doing this, the forecaster can extract relevant information from the numerical model grid-point data.
A steady horizontal motion of air along straight, parallel isobars or contours in an unchanging pressure or contour field.
National Science Digital Library - Isobar
Drawing Contour Plots. A lesson plan that deals with drawing various isopleths including isobars.
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It is represented on a synoptic chart by a system of isobars at a specified altitude level (or a system of contours at a specified pressure level) which enclose relatively low values of pressure (or altitude).
The tendency of wave crests to become parallel to bottom contours as waves move into shallower waters. This effect is caused by the shoaling process which slows down waves in shallower waters.
Return Period ...
CLOSED LOW A region of low pressure distinguished by a center of counterclockwise circulation (in the Northern Hemisphere), and is surrounded by one or more isobars or height contours.
A theoretical horizontal wind blowing in a straight path, parallel to the isobars or contours, at a constant speed. The geostrophic wind results when the Coriolis force exactly balances the horizontal pressure gradient force.
Glaciated cloud(6) ...
isobar: a line of equal pressure resembling a contour line on a map.
isotherm: a line passing through points of equal temperature on a map.
Gradient wind A theoretical horizontal wind that blows parallel to curved isobars or contours above the friction layer.
Granules A network of huge, irregularly shaped convective cells in the sun's photosphere.
Isoheight -A line of constant height above a certain reference point such as sea-level. Also called a contour line.
Isodrosotherm - A line of constant dew point temperature.
VIP - Video Integrator and Processor, which contours radar reflectivity (in dBZ) into six VIP levels: ...
POSITIVE ISOTHERMAL VORTICITY ADVECTION (PIVA)- Advection of higher values of vorticity by the thermal wind on a map of vorticity and thickness contours. Implies an area of rising motion.
 See also: Surface, Temperature, Pressure, Air, High
  
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