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What does it mean when the barometric pressure is at 29.49 inches?
Wiki User
∙ 15y ago
When the barometric pressure is 29.49 inches of Mercury it means the pressure is slightly less than that at sea level. Sea level atmospheric pressure is regarded as 1 atmosphere (= 760 mmHg = 29.92 in Hg = 14.7 lb/in2 = 101.3 KPa)
Pressure lowers (the inches of mercury falls) as one's elevation above sea level increases or as low pressure fronts associated with warmer or wetter weather systems move into an area.
The indicated 1/2 inch difference would inicate being on a slight height of land, or that there was a low pressure zone (damp weather perhaps) in the area. More significant for weather is the rate of change of the barometric pressure.
Wiki User
∙ 15y ago
Wiki User
∙ 13y ago29 mm Hg, or mercury, as it would read in a mercury manometer.
It is a pressure reading. The mercury is put in a tube and inverted and it pulls a vacuum. As the atmospheric pressure changes, the distance changes. Low pressure means bad weather, high pressure means good weather. We usually use digital or mechanical instrumentation these days, but with the same units of measure (mm Hg).
Wiki User
∙ 13y agoIt's the height in inches of a column of Mercury pushed to that height by the atmosperic pressure of air at the location. The instrument used is called a Barometer. The height varies due to location on the planet's surface, the weather and height the instrument is above sea level.
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Does the barometric pressure seldom change?
It depends on what you mean by change. If your mean "Does the pressure swing from lows like 28 inches mercury (severe low) to 32 inches mercury (severe high)?" then the answer would be yes. This sort of shift is what causes most severe weather disturbances, such as lines of thunderheads. The collision of a high pressure and low pressure area cause strong winds, usually some precipitation, and even tornados and other severe weather. If, however, you mean "Is the barometric pressure constant most of the time?" then the answer would be no. The barometric pressure has constant small fluctuations, based on a number of factors.
What does up when the rain comes down?
If you mean what 'goes' up when the rain comes down, then the answer is the barometric pressure. A low pressure cell, which is a chief indicator of a rain storm, occurs when the barometric pressure drops below 30 points. As the storm dissipates, the low pressure cell changes, causing the barometric pressure to rise.
What does weather inches in pressure mean?
Air pressure measured in inches of mercury indicates the level to which a column of mercury rises after being set to a standard pressure initially. One end of the bent mercury tube is closed off, preserving the pressure that existed at the time the tube was closed. Changes in the level of mercury on the other side of the tube reflect changes in air pressure.
What do you call the rate at which air pressure changes between high and low pressure areas?
The pressure gradient, which would be expressed as some unit of pressure change (usually millibars but sometimes inches of mercury) per some unit of distance (usually kilometer).The pressure gradient is roughly proportional to wind speed, so sharper pressure gradients mean stronger winds.
Can mean effective pressure less than atmospheric pressure?
no Because any body subject is affected by the atmospheric pressure in the case of its occurrence under the pressure of what it means that the pressure for increased atmospheric pressure.
Does the barometric pressure seldom change?
It depends on what you mean by change. If your mean "Does the pressure swing from lows like 28 inches mercury (severe low) to 32 inches mercury (severe high)?" then the answer would be yes. This sort of shift is what causes most severe weather disturbances, such as lines of thunderheads. The collision of a high pressure and low pressure area cause strong winds, usually some precipitation, and even tornados and other severe weather. If, however, you mean "Is the barometric pressure constant most of the time?" then the answer would be no. The barometric pressure has constant small fluctuations, based on a number of factors.
What does Barometric reading falling mean?
Falling barometric pressure usually indicates wet weather is on the way.
What does a p0109 mean?
Trouble code P0109 means:Manifold absolute pressure/barometric pressure circuit intermittent
What does P0105 Manifold Absolute Pressure Barometric Pressure Circuit mean?
your inake manifold is leaking or vancuun hose.
What is does this code mean p0105 on a Chevy trailblazer06?
Trouble code P0105 means:Manifold absolute pressure/barometric pressure malfunction
What does this code mean P0108?
Trouble code P0108 means: Manifold absolute pressure or barometric pressure circuit high input
What does code P0106 mean?
Trouble code P0106 means: Manifold absolute pressure or barometric pressure circuit, range or performance problem
What does code p0108 mean on 2002 ptcruiser?
Trouble code P0108 means: Manifold absolute pressure or barometric pressure circuit high input
What does code P0107 mean in a 98 Oldsmobile intrigue?
Trouble code P0107 means: Manifold absolute pressure or barometric pressure circuit low input
What does code P0106 on a 2000 Mazda protégé mean?
Trouble code P0106 means: Manifold absolute pressure or barometric pressure circuit, range or performance problem
What does meterological data mean?
Meteorological data is information obtained from the atmosphere, Such as; barometric pressure, humidity, wind speed, and air temperature.
What does p0108 mean?
You can usually look up the codes on obd-codes.com if you don't have the manual that came with your code reader. P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
