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Wind

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Wind engineering is a field of structural engineering devoted to the analysis of wind effects on the natural and built environment.

 


Wind Barbs determining wind speed
Wind speed is given here in the units of "knots" (knt). A "Knot" is a nautical mile per hour.
1 Knot = 1.15 Miles Per Hour (MPH) ...

Bali wind A strong east wind at the eastern end of Java.
Barat A heavy northwest squall in Manado Bay on the north coast of the island of Celebes, prevalent from December to February.

Wind speed is measured by an anemometer, of which there are many kinds. Most common was probably the 3-cup freely rotating anemometer that is calibrated in a wind tunnel.

Wind chill - a pseudo temperature which lets people know what the cooling effect of the wind would feel like.
Wind shear - a velocity gradient. The change in speed and direction over a set change in position of the observer.

Surface wind Wind blowing near the Earth's surface. It is measured, by convention, at a height of 10 m above ground in an area where the distance between the anemometer and any obstruction is at least 10 times the height of the obstruction.

Wind felt on face; leaves rustle; ordinary vanes moved by wind.
Small wavelets, ripples formed but do not break: A glassy appearance maintained.
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Wind felt on face, leaves rustle, wind vanes move. Small short wavelets.
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wind vane"An instrument used to indicate or measure wind direction. It consists basically of an asymmetrical, elongated object mounted at its center of gravity about a vertical axis.

wind slab"A type of snow crust; a patch of hard-packed snow that is packed as it is deposited in favored spots by the wind (in contrast to wind crust, which is packed after deposition).

wind - Air in motion relative to the surface of the earth. Since vertical components of atmospheric motion are relatively small, especially near the surface of the earth, ...

Wind Shear - the local variation of the wind speed and/or direction in a given direction.

wind
Air in motion relative to the earth's surface, caused by the average movement of a "large number" of molecules of air, usually with scales larger than the random motions of individual molecules; ...

Wind: Southwest at 3 MPH
Humidity: 68%
Dewpoint: 14°F
Barometer: 29.46 inches and rising
Wind Chill: 19°F ...

Wind-A result due to the differences in air mass pressures (temperature). The wind blows as a result of nature trying to balance the differences. The larger the differences between air masses, the stronger the wind.

Wind-Chill Factor: The accelerated heat loss from exposed skin due to increased wind speed. A non-physical value which combines the effect of air temperature and the wind speed to illustrate how the air "feels.

Wind shear - Any sudden change in wind speed or direction.
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Wind
A moving mass of air. The movement of the air causes the weather
Wind Vane ...

Wind Shear - See shear.
Wrapping Gust Front - A gust front which wraps around a mesocyclone, cutting off the inflow of warm moist air to the mesocyclone circulation and resulting in an occluded mesocyclone.

WIND Air that flows in relation to the earth's surface, generally horizontally. There are four areas of wind that are measured: direction, speed, character (gusts and squalls), and shifts.

Wind
The movement of air across the Earth's surface. The wind is a continuous succession of gusts and lulls (quiet intervals) associated with equally rapid changes of direction over a range which may exceed 30°.

Wind Chill Warning- Issued for dangerous, life-threatening wind chills below minus 25F.

Wind
The horizontal motion of the air past a given point. Winds begin with differences in air pressures. Pressure that's higher at one place than another sets up a force pushing from the high toward the low pressure.

Wind Chill: It is based on the rate of heat loss from exposed skin caused by the combined effect of wind and cold. As the wind increase, heat is carried away from the body at an accelerated rate, driving down the body temperature.

Wind Chill The wind chill is the effect of the wind on people and animals.

WIND SHEAR: The change of wind speed or direction with distance, usually vertical.
WIND WAVES: Short period and irregular waves created by the flow of air over the water.

WIND PASSAGE: The distance or length of flow of the air past a point during a given interval of time.
WIND ROSE: A flower-like diagram indicating the relative frequencies of different wind directions for a given station and period of time.

Wind Aloft- the wind speeds and wind directions at various levels in the atmosphere above the area of surface weather observations, usually above about two thousand feet AGL.

wind chill equivalent temperature: air temperature index that attempts to quantify how cold the air feels when skin is exposed to low air temperature and wind. The faster the wind blows, the colder the air will feel.

Wind Chill - The portion of the cooling of the human body caused by air motion. Wind chill becomes important for human health as air motion accelerates the rate of heat loss from a human body, especially when temperatures are below 45oF.

Wind Chill Index
(Wind Chill Factor, Chill Factor) Index used to determine the relative discomfort resulting from a specific combination of wind speed and air temperature, expressed by the loss of body heat in watts per square meter (of skin).

Wind direction The direction from which the wind is blowing.
Wind machines Fans placed in orchards for the purpose of mixing cold surface air with warmer air above.

Wind - The horizontal movement of air relative to the earth's surface.

WIND - air in motion relative to the surface of the earth.
WIND ADVISORY - Sustained winds 25 to 39 mph and/or gusts to 57 mph. Issuance is normally site specific.

Wind chill equivalent temperature A theoretical air temperature at which the heat loss from exposed skin under calm conditions is equivalent to the heat loss at the actual air temperature and under the actual wind speeds.

wind shear—The rate of change of wind velocity (direction and/or speed) per unit distance; conventionally expressed as vertical or horizontal wind shear.
X-Y-Z ...

Wind A natural motion of the air, especially a noticeable current of air moving in the atmosphere parallel to the Earth's surface.

Wind Profiler This is a three beam Doppler Radar system aimed vertically to measure atmospheric winds at different altitudes over a station.

Wind
Wind is the natural motion of the air moving parallel to the Earth's surface.

Wind Chill Factor - The apparent temperature which describes the cooling effect on exposed skin by the combination of temperature and wind, expressed as the loss of body heat. Increased wind speed will accelerate the loss of body heat.

VAD Wind Profile - permalink - collapse
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A radar plot of horizontal winds, derived from VAD data, as a function of height above a Doppler Radar.

Gap Wind - Strong winds that are enhanced by the constriction of narrow passes in complex terrain. Turnagain Arm and the Matanuska Valley are two such gaps that enhance winds.

Fire Wind
A thermally driven wind blowing radially inward toward a fire, produced by horizontal temperature differences between the heated air above the fire and the surrounding cooler free atmosphere.
Firebrand ...

Fall Wind - See Katabatic Wind.
Fata Morgana - A mirage most frequently observed in coastal areas in which extreme towering occurs.

WAD- Wind Advisory
WARM CORE HIGH- A dome of deep high pressure that originates from low latitude areas.

High Wind Warning: A high wind warning is defined as 1-minute average surface winds of 35 kt (40 mph or 64 km/hr) or greater lasting for 1 hour or longer, ...

Tail wind A wind blowing in the same direction as the heading of a moving object, thus assisting the object's intended progress. The opposite of a head wind.

wind shear- vertical eddies or waves of air resulting from one layer of air sliding over another moving at different speeds or directions.
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Wind speeds in the range of 13 to 19 knots.
Monsoon
The term originally referred solely to the winds of the Arabian Sea which blow for about six months from the north-east (in winter) and for six months from the south-west (in summer), ...

Wind- Air in motion that moves relatively horizontally in relationship to the surface of the Earth.
Windchill Factor- A measure of the effect of wind in increasing the heat loss from exposed flesh.

WIND GRADIENT - A slowing of the wind near the earth's surface due to surface roughness or drag.
WINDSPEED - The speed of the air in relation to the ground. See AIRSPEED and GROUNDSPEED.
WING - The lifting surface of an aircraft.

Wind Rose
Any one of a class of diagrams designed to show the distribution of wind direction experienced at a given location over a considerable period; it thus shows the prevailing wind direction.

Wind shear: the rate at which wind velocity changes from point to point in a given direction (as, vertically).

Wind Chill Factor - It's a number that expresses the cooling effect of moving air at different temperatures. Only air temperature and wind speed is used in the calculation of wind chill temperatures.

WIND - Movement of air. Speed is measured in Miles Per Hour (MPH), Knots (KTS), Meters Per Second (M/S), or Kilometers Per Hour (KM/H). A knot is about 1.15 MPH.
WIND VANE - Weather instrument for measuring the direction of the wind.

A wind blowing onshore from the surface of a lake.
Lake-effect snows(6) ...

>> Wind: Basic requirement: The wind speed and direction in the first 30 metres or so of the atmosphere varies rapidly with height, due to the varying frictional effect of the general 'surface roughness'.

Sustained wind or frequent gusts to 35 miles an hour or greater; and
Considerable falling and/or blowing snow (i.e., reducing visibility frequently to less than ¼ mile) ...

Gradient wind - Wind that flows parallel to the isobars, but non-linearly.

sea breeze: wind blowing from the ocean to land at the coast, due to the cool air replacing the warmer air that has moved up on the coastline.
sea level: the imaginary line from which sea depth and land elevation are measured.

See also: Air, Weather, Temperature, Surface, Pressure