The highest altitudes have the lowest air pressure. Air pressure increases as altitude decreases. Above sea level is lower pressure; below sea level is higher pressure.
density
the purge unit exhaust port
The barometric pressure of the air at the center, or eye, of the hurricane. Some of the lowest barometric pressures ever recorded have occured in the eyes of hurricanes. The lowest barometric pressure ever recorded on earth was recorded at the center of the "Labor Day Hurricane" of 1935 which struck the Florida Keys.
The eye of a hurricane is made clear by sinking air. The eye itself has the lowest pressure within the storm.
The highest altitudes have the lowest air pressure. Air pressure increases as altitude decreases. Above sea level is lower pressure; below sea level is higher pressure.
When you are not sitting on it.
Air in a tornado is rapidly drawn upward. This creates low pressure as more air rushes in to replace it. However this can ever completely fill the pressure deficit until the upward movement stops.
The lowest known pressure recorded in a tornado was 688 millibars in a tornado in Tulia, Texas on April 21, 2007.
Yes the pressure drops as the tornado forms and progresses. The tornado's lowest pressure is in the center.
The higher parts
Trough
ity is the lowest layer
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Air pressure is highest when it is cool and dry. It is lowest when it warm and humid. In high pressure, the sky is clear and dry, while in low pressure, the sky is warm and muggy and humid, which is where hurricanes can start.
density
The density of air is lowest in the summer, because warmer air is less dense. (the molecules are in greater motion, and are forced farther apart)