But if there’s less air overhead or the air is rising, the air pressure is lower. The presence of high- and low-pressure systems is what drives much of our weather. Ordinary sea-level air ...

Isobars on weather maps are lines connecting locations with the same air pressure. Isobaric lines form closed loops, thereby identifying areas of low or high air pressure. For example, if all ...

Air pressure is one of the most benign weather phenomena and its effects on the human body are minor, even at the extremes. At Chicago, the record high air pressure is 30.98 inches, recorded on ...

Air pressure readings above 31 inches of mercury are rare and generally occur only during intense arctic outbreaks at locations in high latitudes. Air pressure is determined by the weight of a ...

NASHVILLE, Tenn. (WSMV) - An upper-level pattern resembling the Greek symbol Omega (Ω) is responsible for the quiet weather we will see this week. How often do you see Greek symbols and something ...

High pressure systems form when air descends towards the surface, explaining why they normally bring clear weather since rising air is required for thick cloud and rain. The current systems ...