Wind Vectors indicate wind direction and speed
The black arrows plotted on this image are wind vectors. These vectors indicate direction and intensity of the wind.
vector"Any quantity, such as force, velocity, or acceleration, that has both magnitude and direction at each point in space, as opposed to a scalar that has magnitude only.
vector
Any quantity that is described uniquely by both magnitude and direction at each point in space; compare with a scalar quantity. Examples of vectors include velocity and acceleration.
velocity ...
Q-VECTORS (QVEC, DIVQ)- A mathematical entity (Q-vectors do not exist in the atmosphere) that allows forecasters to better identify areas of vertical motion.
WIND VECTOR: A component of the wind (often using Cartesian coordinates; i.e. X and Y wind vectors). The term can also apply to the resultant wind vector which is sometimes drawn as an arrow with length proportional to wind speed.
Wind Vector Arrow representing wind velocity. The arrow points in the direction of the wind. The length of the arrow is proportional to wind speed.
Wind Velocity Vector term that includes both wind speed and wind direction.
VECTOR - A quantity that has both a magnitude and direction. May also be used as a heading and speed in aviation, or as a location on a chart, map, or computer based graphic. Windspeed and its direction is an example of a VECTOR measurement.
Q-Vectors Like the thermal wind, these are not physical realities (they do not exist). However, they arise mathematically from the Omega Equation and they help explain the results of physical processes in the atmosphere.
Note that this is vector multiplication. In non-vector terms: At a given rate of rotation of the observer, ...
vorticity - A vector measure of local rotation in a fluid flow, defined mathematically as the curl of the velocity vector, z[&zgr;] = ´[×] u, where z[&zgr;] is the vorticity, u the velocity, and the del operator.
A contraction of a vector field; the opposite of Divergence. Convergence in a horizontal wind field indicates that more air is entering a given area than is leaving at that level.
(a) standard radiosonde and radiosonde ground equipment to obtain upper-air data on pressure, temperature, and humidity, and (b) a self-tracking radio direction-finder to provide the elevation and azimuth angles of the radiosonde so that wind vectors ...
The speed and direction of the thermal wind are determined by vector geometry where the geostrophic wind at the upper level is subtracted from the geostrophic wind at the lower level.
DivergenceThe expansion or spreading out of a vector field; usually said of horizontal winds. It is the opposite of convergence.
vertical velocityThe component of the velocity vector, along the local vertical.virgaPrecipitation that falls from a cloud but evaporates before reaching the ground.
The helicity is the area on a hodograph that is enclosed by a line from the tip of the storm motion vector to the surface wind vector, then following the hodograph curve to 3 km level, then back to storm motion vector.
Let's describe its state in the Eulerian fashion by giving the pressure p, temperature T and vector velocity v as a function of position and time. Then, p = p(t,x,y,z) and similarly for the other quantities.
forecast the expected movement of fronts using the simple methods described in text books (for example, active cold fronts can be advected (moved) at a speed of four-fifths the measured geostrophic wind measured just ahead of the front, the vector ...
The wind 10m chart displays the modeled average wind vector in 10 m above the ground for every grid point of the model (ca. every 80 km). Generally the actual observed wind velocity at 10 m above ground is a little bit lower than the modeled one.
Convergence - A contraction of a vector field, usually said of winds; the opposite of divergence.
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.
An anemometer that measures linear components of the wind vector by determining the effect of the wind on transit times of acoustic pulses transmitted in opposite directions across known paths.
A hodograph is obtained by plotting the end points of the wind vectors at various altitudes, and connecting these points in order of increasing height.
Relocated: A term used in an advisory to indicate that a vector drawn from the preceding advisory position to the latest known position is not necessarily a reasonable representation of the cyclone's movement.
wind velocity—A vector term to include both wind direction and wind speed.
wind shear—The rate of change of wind velocity (direction and/or speed) per unit distance; conventionally expressed as vertical or horizontal wind shear.
Thus, one may speak of a gravitational field, magnetic field, or electric field; and, in meteorology, we speak of pressure field, temperature field, etc. If the quantity specified at each point is a vector quantity, ...
Hodograph- A plot representing the vertical distribution of horizontal winds, using polar coordinates. A hodograph is obtained by plotting the end points of the wind vectors at various altitudes, ...
Pressure Gradient ForceA three-dimensional force vector operating in the atmosphere that accelerates air parcels away from regions of high pressure and toward regions of low pressure in response to an air pressure gradient.
Their destructive pattern tends to be different than tornadic winds in that they scatter debris in a narrow vector rather than in all directions.
hydrostatic equation In the vector equation of motion, the form assumed by the vertical component when all Coriolis, earth-curvature, frictional, ...
 See also: Surface, Air, Horizon, Wind, Pressure
  
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